一Hello．Is Mr．Fred available now?
一 ．
| A．I am Mr．Fred． |
| B．Speaking． |
| C．Who are you? |
| D．Who are you looking for? |
It was not until midnight __________ they reached the camp site.
| A．that | B．when |
| C．while | D．as |
We finished the run in less than half the time __________.
| A．allowing | B．to allow |
| C．allowed | D．allows |
Vitamin C helps our bodies make a special chemical, which __________ affects our brains, making us feel happy.
| A．in all | B．in turn |
| C．in advance | D．in short |
He put forward his suggestion at the meeting that every means __________ to save the crops before the storm came.
| A．be tried | B．was tried |
| C．should try | D．tried |
No matter how low you consider yourself, there is always someone __________ you wishing they were that high.
| A．getting rid of | B．getting along with |
| C．looking up to | D．looking down upon |