I can think of many cases _______ students obviously knew a lot of English words and expressions but couldn’t write a good essay.
The reason ___ he can’t come is ______ he has to work late.
This kind of desk can be _______ to the height you need. Besides, it is not expensive at all.
We all think it is Mr Wang as well as his parents that _______ for his son’s bad performance at school.
Almost all the houses in the city are said ________ in the terrible earthquake.
It remains _______ whether Tom will be fit enough to play in the finals.