He is only too ready to help others, seldom, ____, refusing them when they turn to him.
| A．if never | B．if ever | C．if not | D．if any |
1. He kept his head _____ water when he began to learn swimming, but he raised his head now and then
| A．over | B．below | C．above | D．Up |
100. The visitors _______ the castle are asked not to take photographs.
| A．of | B．to | C．in | D．into |
99. If you study harder, you will catchthe others in the class.
| A．up | B．up with | C．up of | D．To |
98. We have friends ____ the world.
| A．through | B．in from | C．throughout | D．all over in |
97. When he was in America, he made a journey of seven hundred miles _____ purpose to get a glimpse of the Niagara Falls.
| A．on | B．by | C．with | D．For |