Mr. Smith, who often helped passers-by repair their bikes, said that what he did was not paid but _______.
| A．relevant | B．optional | C．suitable | D．voluntary |
—I’m going to play soccer now.
—________. It’s raining heavily outside.
| A．Good idea | B．It’s up to you | C．You’d better not | D．I have no idea |
Since I knew how hard the life they lead is, I have understood ____ they need so much money.
| A．how | B．why | C．whether | D．when |
We will be at 10 Baker Street at six o’clock, and we ______ seeing you there.
| A．look out for | B．look for | C．look forward to | D．look down upon |
The singer and dancer _____ asked to sing a song in public, and she agreed happily.
| A．is | B．was | C．are | D．were |
Although the teacher didn’t mention any names, everybody knew who he was ______.
| A．speaking to | B．turning to | C．referring to | D．talking to |