Choose the best answer: 

Those books deal mainly_______ tropical plants.

Choose the answer A, B, C or D into complete the following sentence. "USA has a wide __________ of animal species."

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Thank you very much_____ what you have done for me.

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Mike________ one hour ago.

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It is difficult to finda________ in the Washington area for less than #300 a month.

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Last Sunday was ________ that we took a drive in the country.

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____ here since 1976 when her parents moved from New York.

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After you finish your work, you________ a break.

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No sooner___________ the house than the phone started to ring.

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I am sure he didn’t break the plate______ purpose.

a. in

b. at                          

c. for                           

d. on

Choose the best answer A, B, C, or D to complete the sentences. "She picked up some Spanish ______ she was living in Mexico."

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Working hours will fall to under 35 a week,____________.

I’ll call you_____ soon as I get home from work.

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This book is based_____ part on fact.

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

Nga is____a play for the school anniversary celebration.

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After he________ the house, he wrote a letter.

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The phone________ constantly since Jack won the first prize this morning.

Choose the correct answer A, B, c, or D to complete the sentences. "More open discussions_____ online to help us reach a good decision."

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We________ English this time next Monday.

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When I arrived at the Club, my friends already (go) _______________

 Ann ________ television when the phone rang.