We cannot figure out _______ quite a number of insects, birds, and animals are dying out.
| A．that | B．as | C．why | D．when |
This magazine is very ____ with young people, who like its content and style.
| A．familiar |
| B．popular |
| C．similar |
| D．particular |
Peter is my close friend, who can be ____ what he promises.
| A．relied on to do |
| B．relied to do |
| C．relied on doing |
| D．relying to doing |
Everybody in the village likes Jack because he is good at____ jokes.
| A．seeing |
| B．having |
| C．making |
| D．moving |
Tom put his heart into the wildlife research, and finally, his efforts ____ him great success and fame.
| A．saved |
| B．earned |
| C．made |
| D．offered |
You'd sound a lot more polite if you make a request ____ a question.
| A．in search of |
| B．in the form of |
| C．in need of |
| D．in the direction of |