Mary clapped her hand over her mouth _______ she realized what she had said.
| A．while | B．as soon as |
| C．suddenly | D．then |
The beautiful girl stood there until the train ___________.
| A．lost sight | B．caught sight | C．was out of reach | D．got out of sight |
Mary began here as a(n) ______ worker and ended up getting a full-time job with the company.
| A．optimistic | B．temporary | C．previous | D．uncertain |
Much to my surprise, she _________ tears __________ she read the letter.
| A．burst out; instant | B．burst into; the instant |
| C．burst out; instantly | D．burst into; instant |
----Why didn’t you come to meet me, Bill?
----Sorry, dear. But I really forgot where I was _____ to meet you.
| A．demanded | B．supposed | C．delighted | D．squeezed |
She still remembers Beijing University， ____________she graduated five years ago.
| A．from which | B． from where | C．which | D．不填 |