The wire was found broken. And ______, there happened to be no one getting near.
A.therefore | B.however |
C.otherwise | D.fortunately |
He wondered if he could slip out of the lecture hall without anyone______.
A.noticing | B.noticed | C.to notice | D.being noticed |
We cannot figure out ____quite a number of insects, birds, and animals are dying out.
A.that | B.as | C.why | D.when |
We have been told that under no circumstances_______ the office telephone for personal affairs.
A.may we use | B.we can use | C.we could use | D.did we use |