Each time ________ they met, they would talk long hours together.
A．which B．when C．during D．/
Though ______ _money, his parents managed to send him to a key university.
A. lacked B. lacking of C. lacking D. lacked in
In time of serious accidents, ________ we know some basic things about first aid, we can save lives.
A．whether B．until C. if D．unless
The parents suggested ________ in the hotel room but their kids were anxious to camp out during the trip.
A．sleep B．to sleep C．sleeping D．having slept
________ by the beautiful scenery of the West Lake, the foreigners decided to spend another two days in Hangzhou.
A．Attracting B．Attracted C．To be attracted D．Having attracted
Our food supply ________. We'd better get some in case there's none left.
A. is running out B. has run out of
C. is using up D. has used up
