The rain is very heavy________ we have to stay at home.
A. but B. because C. so
They thought ________ important to look left and right when ________ the road.
| A．it’s, cross | B．it, to cross |
| C．it, crossing | D．it was, to cross |
The guide said that much attention must __________ these details.
| A．pay | B．be paid |
| C．pay to | D．be paid to |
He couldn’t ________an answer when I asked him why he was late.
| A．come over | B．catch up with |
| C．come out | D．come up with |
— Mrs Black is an organized housewife.
—That’s right. Everything in her house is always ________.
| A．in order | B．out of order |
| C．in trouble | D．in the way |
The railway _______ Qinghai to Tibet is the longest plateau (高原) railway in the world.
| A．connected | B．connects |
| C．connecting | D．is connected |