--Why is the road so crowded?
--The two underground lines ________.
| A．are built | B．have been built |
| C．are being built | D．have been building |
Hurry! The train ______.You know it_________at 8:30 am.
| A．leaves ; leaves | B．is leaving ; leaves |
| C．leaves; is leaving | D．is leaving; is leaving |
It is really_______ to take a walk along the peaceful country road.
| A．relaxing | B．excited | C．boring | D． stressful |
You must set off at once, ______you would be late for school.
| A．then | B．and | C．otherwise | D．so |
If you are not satisfied with the price, we can still discuss it.
| A．being offered | B．to offer | C．offering | D．offered |
—I hear that Tom can’t afford his schooling this fall．
—____, let’s do something for him．
| A．If so | B．When necessary | C．When possible | D．If any |