The former Olympic champion was in the quarterfinal that night when he lost 0-2 at home.
| A．knocked off |
| B．knocked out |
| C．knocked down |
| D．knocked over |
QQ, ______you can chat with your friends, makes communication easy.
| A．why | B．which | C．that | D．where |
These tax laws which are intended for domestic companies do not _____ to foreign companies.
| A．contribute | B．lead | C．apply | D．fit |
The film is very humorous but______can be enjoyed unless you understand English culture.
| A．everything | B．something | C．nothing | D．anything |
---Your composition is full of mistakes.
---I wish I______more careful.
| A．would have been | B．had been | C．would be | D．were |
______life began on the earth is one of the biggest puzzles to scientists.
| A．How | B．What | C．Where | D．That |