Speaking of all the songs he has written, I think this is probably his _______ one.
| A．better-known | B．well-known |
| C．best-known | D．most-known |
His health requires that he ________ to bed early.
| A．go | B．goes | C．went | D．going |
I shall never forget the day ________ Liu Xiang won the gold medal, _________ has a great effect on my life.
| A．when; which | B．that; which | C．which; that | D．when; that |
The place ________ the bridge is supposed to be built should be _________ the cross-river traffic is the heaviest.
| A．which, where | B．at which, which | C．at which, where | D．which, in which |
The factory produces half a million pairs of shoes every year, _________ are sold abroad.
| A．80% of them | B．80% of that | C．80% of the shoes | D．80% of which |
China isn't the country _________ she used to be 50 years ago.
| A．that | B．which | C．what | D．since |