We cannot figure out ____quite a number of insects, birds, and animals are dying out.
| A．that | B．as | C．why | D．when |
Co-operation or teamwork, the importance of which is often ________, plays an important part in football matches.
| A．stressed | B．thought of | C．paid much attention | D．talked |
–Mr. Smith is no longer ________he used to be.
--So he is. Success and wealth have _________ his character.
| A．what; trained | B．who; transferred | C．what; transformed | D．who; transformed |
___ you are familiar with the author’s ideas, try reading all the sections as quickly as you can.
| A．Ever since | B．Now that | C．So that | D．As long as |
The present situation is very complex, so I think it will take me some time to ____its reality.
| A．make up | B．figure out | C．look through | D．put off |
In summer people often wear dark glasses as _________ against the bright sunshine.
| A．permission | B．protection | C．prediction | D．prevention |