单选题：I cannot______ puzzled, for I simply cannot understand how I..

题目内容：
I cannot______ puzzled, for I simply cannot understand how I could have made such a stupid mistake.A．help feelB．help but to feel C．but to feelD．help but feel
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Visitors to the National Museum can avoid long lines at the ..

Visitors to the National Museum can avoid long lines at the ticket booths by purchasing tickets ____.A．in advanceB．in detailC．out of orderD．with caution

分类：介词和介词短语  题型：单选题
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Tom earned some money____ babysitting for the couple living ..

Tom earned some money____ babysitting for the couple living next door.A．inB．atC．byD．of

分类：介词和介词短语  题型：单选题
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He focused his effort ____the house ___sale for fear that t..

He focused his effort ____the house ___sale for fear that the prices of them would go up suddenly.A．on; forB．on; inC．to; forD．to; in

分类：介词和介词短语  题型：单选题
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Hearing the fire alarm, she escaped____ from the office, lea..

Hearing the fire alarm, she escaped____ from the office, leaving everything behind, including those important documents. A．in publicB．in panicC．in reliefD．in particular

分类：介词和介词短语  题型：单选题
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The solution ______ this problem is acceptable. So I am ___..

The solution ______ this problem is acceptable. So I am ______ it. A．of; againstB．to; forC．to; onD．on; for

分类：介词和介词短语  题型：单选题
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