.
This old computer must have been of great use to ____________ did the scientific research.
| A．those | B．when | C．whoever | D．whomever |
—I got an A in my English final exam. I really can’t believe it myself!
—. I know how hard you’ve worked for it.
| A．You can’t miss it | B．You deserve it |
| C．You’ll take it | D．That’s too bad |
Global warming sometimes feels like a problem that’s very far away from our lives,
only the government needs to worry about.
| A．everything | B．something |
| C．anything | D．nothing |
is known to all is that Beijing and Zhangjiakou have been trying to co-host the 2022 Winter Olympic Games on Nov 3, 2013.
| A．What | B．Which | C．It | D．As |
—Was it 11 o’clock you begin doing your homework last night?
—Yes, things are always eating up my precious time.
| A．that | B．while | C．until | D．when |
There are 61 million “left-behind children” in central and western China,
the adults have to seek jobs in the cities.
| A．who | B．which | C．when | D．where |