When we ___ a foreign language, we’d respect its ____, or we can’t really learn it well.
| A．speak; idioms | B．study; ways | C．learn; customs | D．master; manners |
The reason for the party was _____ it was Sue’s birthday.
| A．because | B．that | C．because of | D．due to |
No sooner had we reached the top of the hill _____ we all sat down to rest.
| A．when | B．then | C．than | D．until |
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 |