rise in carbon dioxide is causing steady increase in global warming.
| A．The; a | B．不填; a | C．The; 不填 | D．A；the |
She has been in doctors describe as a vegetative （植物的） state for six years.
| A．what | B．which | C．that | D．how |
---What do you think of the film 2012?
---Well, it’s good. At least it’s ________ the one I saw last time with Jean.
| A．as bad as | B．not as good as |
| C．no worse than | D．not better than |
______ a certain doubt among the parents as to the necessity of children's doing so much homework.
| A．It existed | B．There had |
| C．There existed | D．It had |
I’m going to spend the summer holiday in Hainan,________ lives my uncle.
| A．where | B．who | C．which | D．when |
From his expression, I don’t think he could have finished his homework last night, _______?
| A．couldn’t he | B．do I |
| C．did he | D．hasn’t he |