Is it in the factory__ you visited last week__this kind of car is made﹖
You will succeed ________as long as you don’t give up.
---Mum, I have cleaned my room. --- ________.
Why didn’t Jim come to school this morning? ---Because there was _______ with his legs.
There is some doubt_______ he can win the first prize.
It is _____ that the Chinese ping-pong team will win the prize.