Last term our maths teacher set so difficult an examination problem _____ none of us worked out.
| A．that | B．as | C．so that | D．which |
The more one is _______ the English-speaking environment, the better he or she will learn the language.
| A．filled in | B．exposed to | C．caught on | D．kept up |
The question_______ you should take this medicine should be decided by your family doctor.
| A．why | B．if | C． whether | D．that |
The sights of Nanchang never fail to _______ foreign tourists, making them abandon themselves to the beauty of the city.
| A．inform | B．impress | C．convince | D．addict |
You trust an online shop just because it has a beautifully-designed website.
| A．shouldn’t | B．couldn’t | C．mustn’t | D．needn’t |
—Jack said you got a unique watch for your birthday.
—Yes. Maybe it is not to the taste of , but I like it.
| A．anyone | B．everyone | C．none | D．nobody |