You could have watched the movie Transformers 3 last night．Why _____ you?
| A．didn’t | B．haven’t | C．hadn’t | D．shouldn’t |
The news spread yesterday ______President HuJingtao had inspected HongKong army during the 15th anniversary of HongKong returning to China.
| A．when | B．whether | C．that | D．how |
Exciting as its special effects are , there is too much violence in the film.
| A．to watch | B．to be watched | C．watched | D．being watched |
According to scientists, our mental abilities begin to from the age of 27 after reaching the highest level at 22.
| A．differ | B．increase | C．develop | D．decline |
If not tired from work, I will spend some time in my study every evening.
| A．locking | B．locked |
| C．having locked | D．being locked |
The research lacks evidence, and therefore, its conclusions are doubtful.
| A．solid | B．fierce | C．severe | D．potential |