Would you mind __ me how ___ the chemistry problem?
| A．telling；to solve | B．telling；solve |
| C．to tell；to solve | D．to tell；solve |
When you take a plane, you_______ obey the rule to turn off your cell phone.
| A．need | B．must |
| C．may | D．could |
He was stopped when he tried to_______ on the queue.
| A．push in | B．turn in |
| C．give in | D．come in |
My English teacher is very knowledgeable_______ she has been to many countries.
| A．but | B．so that |
| C．because | D．when |
- What do you think of the traffic in our city?
- It's_______ than it used to be, but there's still a long way to go.
| A．worse | B．worst |
| C．better | D．best |
Children are often warned_______ with fire.
| A．not to play | B．to play |
| C．don't play | D．doesn't play |