问题

The ______ of new inventions(发明) should be to make life easier, not to make it more difficult.

A:keep off
B:give out
C:take in
D:put up;

正确答案是：

同类题型

have something ______today — I must go and have a flight ticket to Washington______.

Luckily ______ to be no one under the tree when it broke down

How old is Tom—He is ____.

Who is _______ man in a black hat—It’s Jim Brown. We often play _______ basketball together (一起）.

Franklin’s ability to learn from observations and experience ____ greatly to his success in public life.