Most birds find it safe to sleep in the trees, but ____ they have eggs or young chicks, they don’t use a nest.
| A．why | B．how | C．unless | D．where |
_________it is true that a student’s most important goal is to do well in his or her studies, it doesn’t need to be the only goal.
| A．When | B．As | C．While | D．Before |
.—Do you want tea or coffee?
—_________, I really don’t mind.
| A．Both | B．None | C．Either | D．Neither |
___________of danger in the street at night, she had to go home, with a friend_____her.
| A．Warned; accompanied |
| B．Having warned; accompanying |
| C．Warning; accompanying |
| D．Having been warned; accompanying |
______ strong and powerful China will certainly benefit ______ whole world.
| A．A; a | B．The; a | C．The; the | D．A; the |
In the dark forest _______, some large enough to hold several English towns.
| A．stand many lakes | B．lie many lakes |
| C．many lakes lie | D．many lakes lies |