The refugee crisis（难民危机） in Europe, if ________ properly, can lead to serious social problems.
A. not handled B. not being handled
C. not to be handled D. not having been handled
It is generally cold and dry here in autumn, but sometimes, it ________ also be warm and rainy.
A. may B. should C. must D. can
Thanks to the immediate measures taken by the central government, the economy of China ________ soon after the global financial crisis.
A. took up B. rose up C. picked up D. put up
The difficulty lies in ________ they will come to our help immediately.
A. whether B. that C. if D. which
It is recently reported that quite a number of applications ________ from Apple’s official APP. Store are not safe to use.
A. downloading B. downloaded
C. having downloaded D. to be downloaded
Pointing to a small village at the foot of the mountain, he told us that was ________ he was born and brought up.
A. what B. in which C. how D. where
