—How did you work out the Math problems?
—Not able to ________ such difficult problems on our own, we had to turn to the teacher for help.
| A．explain | B．handle | C．tolerate | D．select |
The city's underground _____ more people than the buses.
| A．brings | B．sends | C．fetches | D．carries |
She _____ me to open the door.
| A．posted | B．noticed | C．signed | D．drilled |
Did you get much _____ from your holiday?
| A．honour | B．benefit | C．reward | D．prize |
To ask someone for help is to turn _____ him.
| A．to | B．for | C．on | D．by |
Smoking is not _____ in the meeting hall.
| A．supposed | B．allowed | C．happened | D．admitted |