Men studetns signed up for the ___ race in the sports meeting to be held next week.
| A．800-metre-long | B．800-metres-long | C．800 metre long | D．800 metres long |
Her handbag is on her desk. She ____ back home.
| A．must go | B．can’t go | C．must have gone | D．can’t have gone |
He seems ____ something valuable. He looks so worried.
| A．has lost | B．to lose | C．to be losing | D．to have lost |
Don’t take her seriously, she’s just ____.
| A．acted out | B．acted up | C．acting out | D．acting up |
We will have more money to spend after we ____ our mortgage (贷款).
| A．pay off | B．pay for | C．pay on | D．pay down |
It’s hard to finish the work in a day. You’d better ____ your friends to help you.
| A．call for | B．call on | C．call at | D．call up |