Billy is so tired _____ he worked all night in his office.
| A．when | B．because | C．if | D．so |
Stephen Hawking can’t walk or even speak，_____he has become very succ
essful.
| A．but | B．and | C．or | D．then |
_____of the two story books are very interesting, so I can’t decide which one to choose.
| A．All | B．Any | C．Either | D．Both |
Mary is tired of learning because she is_____ to do better than she can, both at school and at home.
| A．thought | B．expected | C．hoped | D．helped |
Sometimes most of us probably are angry______our friends, parents or teachers.
| A．to | B．with | C．at | D．for |
—Which city is your favorite?
—Hangzhou, of course. It’s the _____place that I want to visit.
| A．worse | B．worst | C．better | D．best |