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【題目】When does the man want to go to the museum?

【題目】This clock needs ______, for it is five minutes ______.

【題目】The o of grain has doubled in China in the last ten years.

【題目】The poem is so beautiful. I’ll try to learn it _____ heart．

【題目】Why is the woman going to Germany?

【題目】H is one of the biggest problems in some developing countries.

【題目】On an average day most of us _____ our smart phones 47 times, and nearly double that if we’re between the ages of 18 and 24.

【題目】The government has taken some measures to reduce the smog, but it may be some time _____ the situation improves.

【題目】Why did the man fail to answer the phone?

【題目】What do we know about Mr. Smith?