Sarah pretended to be cheerful,_________ nothing about the argument.
| A．said | B．to say | C．saying | D．to be saying |
I shall never forget the day __________ Shen Zhou V was launched, ______________ has a great effect on my life.
| A．when, which | B．that, which |
| C．which, that | D．when, that |
______ is known to everybody, Taiwan is a part of China. We must unify it.
| A．It | B．As | C．That | D．What |
—Would you be able to go to the party?
| A．I don't expect | B．I'm afraid not |
| C．I don't think so | D．I believe not |
—Are you coming to the English evening?
—I'm not sure. I ________ go to the concert instead.
| A．must | B．would | C．should | D．might |
Hearing his words, I couldn't decide ______ or remain.
| A．whether to go abroad | B．if I go abroad |
| C．if to go abroad | D．to go abroad |