— Many drugs have been forbidden recently.
— Actually. But the scientists say that before a new drug ___ on humans, plenty of studies___.
A. can be tested; are needed
B. can test; are needed
C. can be tested; need
D. can test; need
— He speaks Chinese very well.
— It’s not surprising. He ___ in Beijing for nine years next week.
A. has been living
B. has lived
C. will have been lived
D. will have been living
We will hold a meeting to sum up our experience ____ we finish our task.
A. in case B. even though
C. despite D. immediately
It is confirmed that a person can not be actually pleased if ___ he appreciates doing is ignored by the company as of no value.
A. when B. that C. what D. where
___ the machine’s enormous size, it runs smoothly and noiselessly.
A. For good B. For ever
C. For all D. For sure
Eventually the two sides reached an agreement ___ could not be taken the place of.
A. whose the details B. the details of whose
C. whose details D. of which details
