Many sailors think that a thick fog is their ________ enemy.
| A．dead | B．dying | C．death | D．deadly |
He is always helping people without expecting anything _____.
| A．in common | B．in turn | C．in danger | D．in return |
He speaks English well indeed, but of course not _____ a native speaker.
| A．as fluent as | B．more fluent than | C．as fluently as | D．much fluently than |
Computers have been made ______ clever that they can ______ problems like humans _______.
| A．such; deal with; in some way | B．so; do with; in one way |
| C．such; do with; in the way | D．so; deal with; in a way |
Old people need special care in winter, as they are very______ to sudden change of the weather.
| A．sensitive | B．painful | C．attractive | D．familiar |
--- Let’s go to play football, shall we?
--- Sorry, I can’t. I must go over the points the teacher explained ______ I forget them.
| A．after | B．when | C．before | D．since |