My grandparents like stories __________ have happy endings.
A. they B. who C. which D. /
John opened the door ________ because he didn’t want to wake up his parents.
A.heavily B.loudly C.quietly D.angrily
The air quality in this city is much ________than before.
A.good B.better C.best D.the best
The boy has been missing for five days and his parents are worried about his______.
A. attention B. safety C. action D. growth
I go now, or I'll miss my train.
A.can B.might C.must D.could
Mary is leaving ________ Shanghai next week.
A.to B.for C.at D.on
