I have waited for the bus for twenty minutes.(对画线部分提问)________________ have you waited for the bus?
Reading makes _______ (we) wiser and more learned.
Don’t make the wetlands smaller. There is ________ (越来越少的空间) for wildlife.
________ (为了保护) students’ eyesight, Chinese government has taken action in recent years.
Millie is helpful and she ________ (与……和睦相处) her classmates.
A policeman is standing ________ (在……中间) the road directing the traffic.