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In the United States, the burning of fossil fuels to make electricity is the largest source of heat-trapping pollution, ____ about two billion tons of CO2 every year.

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The seamen .........  in sympathy with the dockers

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Whole – grain food products…….in most large supermarkets across the United States and Canada.

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Vaccinating 80% of the population could _______ the progression of the contagious disease

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They asked me when _________ 

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You mean I shouldn’t come tonight – is that what you’re ............ ?

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Only then ____ the letter from my son

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Under the threat of a strike, the management gave ___________ and agreed to reinstate annual pay increases for all employees

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He spent all his money through………

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The invention of the mobile phone has undoubtedly revolutionized the way people communicate and influenced every aspect of our lives. The issue is whether this technological innovation has (25) _____ more harm than good. In order to answer the question, we must first turn to the types of consumers. Presumably, most parents (26) _____ are always worrying about their children’s safety buy mobile phones for them to track their whereabouts. We can also assume that most teenagers want mobile phones to avoid missing out on social contact. In this context, the advantages are clear. (27) _____, we cannot deny the fact that text messages have been used by bullies to intimidate fellow students. There is also (28) _____ evidence that texting has affected literacy skills. The widespread use of mobile phone has, out of question, affected adult consumers too. What employee, on the way home from work, would be reluctant to answer a call from their boss? Apparently, only 18% of us, according to a survey, are willing to switch off our mobile phones once we've left the office. Admittedly, mobile phones can be intrusive but there are obvious benefits to possessing one. Personally speaking, they are invaluable when it comes to making social or business arrangements at short (29) _____. They also provide their owners with a sense of security in emergency situations

She___________ to work every day.

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The heritage site is famous for both its cultural beauty and natural integrity

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Since the news that coffee can be very harmful to one's health was broadcast, the consumption of coffee has dropped to a much ------- level than in years past.

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If it snowed this summer, we ........................ skiing

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Conservation is a challenging job but we cannot ____

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The stars ..... as soon as it was dark

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It's been a few months since we've seen my mother-in-law so we need to ______________ a visit this weekend

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You can take advantage of the special offer should you decide to join Marcia Dance program ------- the month of April

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It snowed so much that the event couldn't go ___________ as planned, unfortunately

Choose the letter A, B, C or D to complete the sentences.

A: “How are you?”

B:“………………”

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We were just ________ in the sitting area and somehow the window got broken