We must take measures to stop various kinds of pollution ______ the environment gets worse.
A. unless B. until
C. before D. when
The rumor has been confirmed __________ UN peacekeeping forces would take operations in the region .
A. what B. why C. that D. how
Hearing his friend calling him , out __________ .
A. rushing the boy B. the boy was rushing
C. rushed the boy D. did the boy rush
Whatever happens, you may depend on ________ that I will be with you.
A. it B. /
C. what D. that
__________ in the new on-line game , he missed the final boarding call of his flight .
A. Absorbed B. Absorbing
C. Having absorbed D. Being absorbed
It sounds like something is wrong with the car’s tyre. , we’d better take it to the garage immediately.
A. Otherwise B. If not
C. But for that D. If so
