I can't _ him in the knowledge of wild plants．As a matter of fact, he' s an expert．
| A．match | B．win | C．compare | D．defeat |
. He was not brave. He ____ jump down from the roof.
| A．dare not | B．dared not | C．dares not | D．dare not to |
—Is your mother still a teacher? —______.
| A．Yes, she was | B．She didn’t use to | C．No, but she used to | D．No, but she used to be |
—Shall I go and buy two more bottles of beer?
—No, I’ve already bought twenty. That ___ be enough for us two.
| A．can | B．may | C．ought to | D．might |
.—Did you visit the museum? —No, we ____ it, but we spent too much time shopping.
| A．could have visited | B．must have visited |
| C．can’t have visited | D．shouldn’t have visited |
Crusoe had to stay in cave, ___ go out, even for food.
| A．daring not to | B．not daring to | C．not daring | D．daring not |