His failure made his father think him a ___________ boy.
| A． disappoint | B．disappointed | C．disappointing | D．disappointment |
Tonny is the best student of the three. In other words, he is _______ student than the other two.
| A．a better | B．the better | C．the best | D．a best |
She said that she would do _______ she could __________ her daughter laugh.
| A．what, make | B．that, make | C．what, to make | D．that, to make |
There is a wire pole along the road _________ meter.
| A． about fifty | B．every fiftieth | C．each fifty | D．every 50 |
I have some _________ in working out the problem.
| A．difficulty | B．difficulties | C．troubles | D．difficult |