. Mary had taken _____ to see that her guests had everything that they could possibly want.
| A．efforts | B．pains | C．attempts | D．endeavors |
—Excuse me. Did you notice whether the No. 108 bus had gone by?
—Not ____ I’ve been standing here.
| A．as | B．when | C．since | D．while |
___ the Internet is bridging the distance between people, it may also be breaking some home or will cause family problems.
| A．When | B．While | C．If | D．As |
I felt somewhat disappointed and was about to leave _____ something occurred which attracted my attention.
| A．unless | B．until | C．when | D．while |
Led by the Party, ___ we fight firmly with one heart and one mind, depending upon science, we will surely defeat SARS.
| A．in case | B．so far as | C．even if | D．so long as |
—I’d like to invite you to my new house next weekend.
—Thank you, but ____ I’ll have time I’m not sure at the moment.
| A．when | B．as | C．in case | D．unless |