You had better go at once, ____ you?
| A．shouldn’t | B．wouldn’t | C．hadn’t | D．couldn’t |
Although I hadn’t seen Tom for years , I immediately ______him ______in the crowd .
| A．picked ; up | B．picked ; out | C．picked ; at | D．picked ; on |
Chinese Premier Wen Jiabao _______an important speech on April 30,2011 in Indonesia, __________he is currently on an official visit .
| A．is delivering ; that | B．was delivered ; in which |
| C．delivered ; where | D．had delivered ; when |
The specialist, ______ some of his assistants, ____ to attend our discussion.
| A．and; is | B．or; are | C．as well as; is | D．except for; are |
Smiles around the world _____ be false, ______ other feelings like anger, fear or worry.
| A．must; hide | B．must; hiding | C．can; hide | D．can; hiding |
Using Dr Yuang's hybrid rice, nowadays farmers are producing harvests ________ before.
| A．as twice large as | B．twice as much as |
| C．twice as large as | D．as twice much as |