No wonder the vacuum cleaner isn't working. You haven't ____ it ____.

Choose the best answer among A, B, C or D that best completes each sentence:The tourists were harmed ____ the train crash.

Choose the correct answer in each sentence.

There are a number of free Web-based ------that provide tips for locating information in historical databases.

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Those giving demonstrations at the department store ______________   explained the product's features and benefits.

 I am so lonely and bored in this town; ______ ever invites me______ 

She is keen on ……………………… with a doll. 

Brackwell Farms plans on implementing a natural ............... system that checks for the acidity levels in the soil.

Ms. Jane Millard will be the guest lecturer at a ................. of seminars on ethical journalism.

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After the floods, contaminated water was a serious __________ to public health.

The _______ by UN troops prevented fighting from breaking out.

The outstanding from customers helped .............. to ensure that Ms. Gilmore would stay with the company.

................... our financial goals for this year may require cutting back on some overhead costs.

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It was very nice ............ him to give me a lift.

Tommy and Mary were mischievous children. They  ..............  tricks on their teachers, which always got them into a lot of trouble.

There was nothing else he could do. That was_______ 

She gave_______ which had not been written out. 

The newest prototype ......... to give the engineers at Nova Enterprises a marked advantage over their competition.

The invoice .............. was received two days ago is inaccurate and a new one must be requested.

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Because of  _____  regarding noise, the hotel manager has instructed the landscaping staff to avoid operating equipment before 9:30 A.M.

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My aunt gave me a hat on my 16th birthday.

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The CEO held a press conference to -------- for the negative health effects caused by her company's product.