1.When is the best time 选D plant trees in Beijing?
A.on B.in C.for D.to
2.He 选C know the answer,but I'm not sure.
A.maybe B.may be C.may D.must
3.The bottle is full of milk.(改为同义句)
The bottle is filled with milk.
4.你可以通过邮局邮购图书
You can buy the books through the post office.
5.我们需要把照片挂在墙上
We need to put the photos on the wall
6.我们尽量准时到达那里
We try to get there on tim