Many a student_____ the importance of learning a foreign language.
A have realized B has realized C have been realized D has been realized
In the face of _____ failure, it is vital that we should keep up _____ good state of mind．
| A．a; / | B．/; a | C．the; / | D．/; the |
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 |