问题

What else must we pay attention to ____ our school clean–We must not throw any litter onto the ground.

A:keeping
B:kept
C:keep
D:to keep;

正确答案是：

同类题型

.—Which month has_____ days in a year —February.

We’ll be free tomorrow，soI suggest ______ to the history museum

Does coffee really work when you have to work late into night?—Yes.As far as I’m concerned,I feel very________after a coffee.[ ]

The damaged building ,so the people will have to look for other places to shelter themselves from thecold.

The singer’s flight was due to bad weather, resulting in the show .