Experts are trying to work out a plan to deal with the problems caused by global warming _________ it is too late.
| A．if | B．before | C．when | D．until |
James left his hometown when he was 16, and he ______ back there since.
| A．wouldn’t be | B．hasn’t been |
| C．hadn’t been | D．won’t be |
That day I saw Mary grab the cat by ______ tail — which was _____ rather stupid thing to do.
| A．the; a | B．a; a |
| C．a; 不填 | D．the; 不填 |
– Do we get paid this week?
– ______! I’m running out of money.
| A．No way | B．No problem |
| C．I hope so. | D．I’m afraid not |
stomach
| A．march | B．chemistry | C．attach | D．choose |
exercise
| A．example | B．exchange | C．expert | D．expensive |