If this bridge can't be repaired, ____ will mean no food will be transported to the flooded areas.
| A．what |
| B．it |
| C．as |
| D．which |
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 |
He is strict with himself in the work, so the manager ____ him a lot.
| A．believes | B．believes on | C．believes in | D．believes with |