问题

In some cities the traffic police use computers to keep the traffic________smoothly

A:So itis
B:So is it
C:So it has
D:So has it

正确答案是：

同类题型

Jane’s pale face suggested that she_____ill, and her parents suggested that she________medical examination.

Every Sunday morning I need an hour to enjoy my pleasant breakfast with ________ newspaper.

His uncle is a worker and has been workingin the factory for more than ten years _____

o his research work, the professorcared little about any other things．

We have a lot of work______today.