He broke his legs while ＿＿＿＿＿.
| A．riding | B．ride | C．was riding | D．rode |
She said，“ Please be careful. Don't knock off the glass of water. ”—She asked me _________knockoff the glass of water.
| A．please be careful not to |
| B．to be careful not to |
| C．to be careful to not |
| D．not to be careful to |
Knowing her son was out of danger, the mother sighed _________ relief.
| A．in | B．over | C．about | D．on |
The building was completely _________ by fire.
| A．destroyed | B．injured | C．hurt | D．damaged |
—Why are they _________ the forest?
—They are _________ some criminals.
| A．searching ； searching |
| B．searching for；searching |
| C．searching；searching for |
| D．searching for；searching for |
He had his camera ready _________ he saw some-thing that would make a good picture.
| A．even if | B．if only | C．in case | D．so that |