Tom had no choice but _____ the classroom with his classmates.
| A．to clean | B．clean | C．cleaning | D．cleans |
Cloned pigs differ __________ the originals __________ looks and behavior.
| A．in; from |
| B．from; in |
| C．at; from |
| D．in; at |
—We must __________ their permission. Whatever the cost is.
—But I'm afraid they will reject.
| A．obtain |
| B．cast |
| C．forbid |
| D．Undertake |
The two kinds of cellphones differ __________ shape, but they are similar __________ each other in some functions.
| A．from; with |
| B．in; to |
| C．in; with |
| D．from; to |
(2012·浙江) According to scientists, mental abilities begin to __________ from the age of 27 after reaching the highest level at 22.
| A．differ |
| B．shrink |
| C．fail |
| D．Decline |
(2012·安徽) The athlete's years of hard training __________ when she finally won the Olympic gold medal.
| A．went on |
| B．got through |
| C．paid of f |
| D．ended up |