China is becoming stronger and stronger and _________ an important role on the international stage in recent years.
A. plays B. was playing C. played D. has been playing
Instead of blaming others for our failure, we should _________ what to do next and try our best to succeed in the future.
A. figure out B. carry out C. take out D. put out
Look, the ground is wet. It must have rained last night, _________?
A. wasn’t it B. hasn’t it
C. didn’t it D. mustn’t it
Air pollution results in stronger greenhouse effect, which __________ leads to global warming. We must take measures to prevent pollution before it is too late.
A. generally B. gradually C. gently D. usually
—What do you think of the Eight Rules of the central government?
— Effective and ___________.
A. usual B. natural C. normal D. practical
