I would rather he a hand to lift the heavy box upstairs. However ,to my disappointment, he didn’t.
| A．would give |
| B．should give |
| C．gave |
| D．had given |
I’m not sure whether I’ll succeed in persuading her., I will try all possible means to make it.
| A．Even though | B．If so | C．Anyhow | D．Instead |
Many scientists believe that global warming , if , will cause extreme climate changes this century .
| A．not stopping | B．no stop | C．not stopped | D．without stop ycy |
John did quite well in his exams ,how little he studied .
| A．consider | B．considering | C．considered | D．to consider |
Although there is no life on Mars now , some scientists think that there some form of life a long time ago .
| A．must be | B．may have been | C．can have been | D．could be |
They were playing in the garden they heard a scream .
| A．while | B．as | C．until | D．when |