They asked the government to make ______clear to the public ______ they did was right.
| A．it; that what | B．it; that | C．that; what | D．this; that |
You should made it a rule to leave things _______ you can find them again.
| A．when | B．where |
| C．then | D．there |
In time of serious accidents, _______ we know some basic things about first aid,we can save lives.
| A．whether | B．until |
| C．if | D．unless |
The world is changing fast.I strongly believe that one will easily fall behind _______ he keeps on learning.
| A．unless | B．if |
| C．when | D．as |
The traffic is very_______.It’s quicker to walk there.
| A．noisy | B．crowded |
| C．narrow | D．heavy |
He has read two novels _______.
| A．recent | B．late |
| C．lately | D．ago |