_______ they are twin brothers, they don’t look like each other.
A. Though B. Since C. However D. When
—Do you mind if I smoke here?
—_______ You can go to smoke in the next door.
A. Yes, please. B. Never mind. C. You’d better not. D. Of course not.
Sandy didn’t tell her parents that she was going home because she wanted to give them a _______.
A. gift B. call C. surprise D. note
This is _______ difficult problem that few students can work it out.
A. so B. so a C. such D. such a
It’s nice _______ Andy _______ me with my English study.
A. at; to help B. of; to help C. with; help D. of; help
We will fly a kite as soon as your homework _______.
A. finishes B. will be finished C. has finished D. is finished
