Once _____, it won’t be easily forgotten.
| A．saw | B．seeing | C．seen | D．see |
______ with so many challenges, Yang Guang, a blind young fellow, didn’t give up; he made great efforts to win success.
| A．Facing | B．To face | C．Faced | D．Face |
The more one is _______ the English-speaking environment, the better he or she will learn the language.
| A．exposed to | B．filled in | C．caught on | D．kept up |
The question_______ you should take this medicine should be decided by your family doctor.
| A．why | B．whether | C．if | D．that |
The sights of Nanchang never fail to _______ foreign tourists, making them abandon themselves to the beauty of the city.
| A．impress | B．inform | C．convince | D．addict |
You trust an online shop just because it has a beautifully-designed website.
| A．shouldn’t | B．mustn’t | C．couldn’t | D．needn’t |