John is the only one of the students in our class that never ______ a mistake even when it is pointed out to him.
The government’s ________attitude was a block to further talks.
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.