Is it the country ________ you studied ________ you are going to visit next week?
| A．in which; which | B．where; that | C．that; that | D．where; where |
I can think of many cases _____ students obviously knew a lot of English words and expressions but couldn’t write a good essay.
| A．why | B．which | C．as | D．where |
It is well understood _____ controls the flow of carbon dioxide in and out the atmosphere today.
| A．that | B．when | C．what | D．how |
–How far apart do they live?
–_____ I know, they live in the same neighborhood.
| A．As long as | B．As far as | C．As well as | D．As often as |
He was about to tell me the secret _____ someone patted him on the shoulder.
| A．as | B．until | C．while | D．when |
He’s got himself into a dangerous situation _____ he is likely to lose control over the plane.
| A．where | B．which | C．while | D．why |