Is it in the factory _____you visited last week _____this kind of car is made?[ ]

I don’t know______ he will come tomorrow. ______ he comes, I’ll tell you.

ly we have seen the film The Flowers of War, _______ are used in some restaurants to attract consumers.

The students found _______ easy to work outthis maths problem.

_______he is good at playing basketball, he failed to join the school basketball team yesterday