--- It’s the fourth time that heavy smog(雾霾) has hit the city this month.
--- It’s high time we _______ measures to fight air pollution.
A. will take B. took C. to take D. taking
Science has given clear evidence ______ smoking can lead to many diseases.
A. what B. which C. that D. where
We admire this family, ______ the parents treat their child like a friend.
A. why B. which C. where D. that
The weather in Inner Mongolia is always dry, but sometimes it _____ rain heavily.
A. need B. can C. must D. shall
No pleasure can equal ______ of having a good sleep after hard work.
A. that B. one C. it D. those
--- Hi Mike, are you busy now?
--- Not really. I _____ my work, and I’m going to see a movie online.
A. did B. have been doing C. had done D. have done
