Tens of thousands of trees ______ along the Changjiang River in the past few years to prevent the soil from being washed away.
A. have been planted B. were planted
C. have planted D. had planted
______the news, so far, has been good, there may be bad days ahead.
A. when B. while C. If D. Since
______ in March, that so many people had on their light wears.
A. So hot became the weather B. So became the hot weather
C. The hot weather became so D. So hot did the weather become
We should consider the students’ request ______ the school library provide more books on popular science.
A. that B. when C. which D. where
---The last one ______ pays the bill.
--- Agreed.
A. arrived B. arrives C. arriving D. to arrive
Taobao is Asia's largest retail（零售的） network platform, ______ people can buy and sell many kinds of things．
A． when B．whose C．that D．where
