You never know how much difficulty we had _________________ the problem. Luckily, we try to solve it with Mrs Wu’s help.
China is very ______the Great wall and pndas
Which hobby do you think _________good for your study?
There is ______ in today’s newspaper.
My room is a bit untidy. So I’ll tidy it _______.
—It’s a pity that Jerry didn’t go to yesterday’s meeting.—Yes, he missed a good of being chairperson of the Students’ Union.