Cars do cause people some health problems, in fact far more serious _____ than computers do.
| A．one | B．ones | C．it | D．those |
Although Tom agreed with her on most points, here was one _____ which he was unwilling to give in.
| A．on | B．in | C．to | D．with |
Heilongjiang Province is _____ north of Liaoning. Harbin, its capital city, lies _____ the Songhuajiang River.
| A．to; on | B．in the; in | C．不填; on | D．to the; in |
I don't remember___________ to the airport that year.
| A．to be taken | B．being taken | C．having | D．to take |
A man does not know the difficulty of anything_________ he does it personally.
| A．although | B．if | C．because | D．Unless |
There is a _________ of 1000 dollars for the return
| A．reward | B．prize | C．thank | D．Phrase |