Putting out forest fire is regarded as one of _____ problems in the world．（ ）
| A． |
difficult |
B． |
more difficult |
| C． |
most difficult |
D． |
the most difficult |
He tried to make himself ________ by his students, but he failed.
| A．understand | B．understood |
| C．understands | D．understanding |
---The medicine _________ awful. I can’t stand it.
---I know, Jimmy. But it’s helpful for you.
| A．tastes | B．eats |
| C．drinks | D．takes |
When I passed the classroom, I heard a girl ________ in it.
| A．sing | B．to sing |
| C．sang | D．singing |
—His rude words made very .
—I’m sorry to hear that.
| A．I, angry | B．me, to be angry |
| C．me, angrily | D．me ,angry |
When something______ me, I always feel_______．
| A．worry; worried | B．worries; worry |
| C．worries; worried | D．worried; worries |