No one believes the small dark lab is ___ home to so many great inventions at___ first sight.
| A．the; the | B．不填；the | C．the；不填 | D．不填；不填 |
Only when you can find peace in your heartgood relationship with others.
| A．will you keep | B．you will keep |
| C．you kept | D．did you keep |
Students should involve themselves in community activitiesthey can gain experience.
| A．who | B．when |
| C．which | D．where |
The exact yearAngela and her family spent together in China was 2008.
| A．when | B．where |
| C．why | D．which |
How could yousuch a fantastic job when you have been out of job for months?
| A．turn to | B．turn on |
| C．turn off | D．turn down |
Jack wasn’t saying anything, but the teacher smiled at him ___ he had done something clever.
| A．as if | B．even if |
| C．while | D．though |