— How does David usually go to work?— He ______ drive a car, but now he ______ there to lose weight.
_______ they are twin brothers, they don’t look like each other.
—Do you mind if I smoke here? —_______ You can go to smoke in the next door.
Sandy didn’t tell her parents that she was going home because she wanted to give them a _______.
This is _______ difficult problem that few students can work it out.
It’s nice _______ Andy _______ me with my English study.