I was doing my homework _______ my father was reading newspapers.
A. how B. while C. if
--- When will you return to your hometown? ---__________.
| A．Not until the end of this month | B．Until next week |
| C．A few days ago | D．A few weeks before |
Only ________ of the students come to school by bus.
| A．three fifth | B．third fifths | C．three fifths | D．third fifth |
It is selfless ________ the doctor to devote all the time he had ________ for the patients.
| A．for; to care | B．of; to care | C．for; to caring | D．of; to caring |
--- is the school from your home, do you know?
--- About 30 minutes’ walk.
| A．How far | B．How long | C．How much | D．How soon |
---How long have you ________ your penfriend?
---For five days. I received it last Sunday.
| A．heard from | B．received the letter from | C．heard of | D．had the letter from |