问题

With the touch of a button or the click of a mouse, people will find abundant information from the largest libraries and museums in the world .

A:under their control
B:at their convenience
C:at their command
D:at their service

正确答案是：

同类题型

There are a number of methods to provide___________ relief from your toothache pain, which can’t cure the problem.

Do you think Andy can be a good policeman— Yes, I think so. He has the ability to stay when something dangerous happens.

my God，I left my portable computer in the taxi!— ______. Let’s call the taxi company first．

Why didn’t you do your math homework lastweekend? — My cousin borrowedmy math book and didn’t_____ __it.

Which underlined part has a different pronunciation from the others