— It sounds like something is wrong with the car’s engine.
—______, we’d better have it repaired immediately.
| A．Where possible | B．If not |
| C．But for that | D．If so |
What a(n) ______ it is that they were born in the same year and on the same day!
| A．coincidence | B．accident | C．incident | D．confidence |
It was not until she had arrived home _______ her appointment with the doctor.
| A．when she remembered | B．and she remembered |
| C．did she remember | D．that she remembered |
Smoking, ______ is a bad habit, is popular with the young.
| A．that | B．which | C．what | D．as |
The number of the people who own cars ______since 1990.
| A．is increased | B．are increased |
| C．have been increasing | D．has been increasing |