He made another wonderful discovery, ______ of great importance to science.
| A．which I think is | B．which I think it is | C．which I think it | D．I think is |
It rained heavily in the south, serious flooding in several provinces.
| A．caused | B．having caused | C．causing | D．to cause |
Most people are _________ bringing down the price of housing because it’s too high for them.
| A．in honour of | B．in search of | C．in charge of | D．in favour of |
He wondered if he could slip out of the lecture hall without anyone .
| A．noticing | B．noticed | C．to notice | D．being noticed |
Jenny was looking for a seat when，luckily，a man and left．
| A．took up | B．got up | C．shut up | D．set up |
—There is a hole in your bag?
—I know. I'm going to have it __________.
| A．mend | B．mending | C．mended | D．to be mended |