问题

We worried about ______ he was in good health.
A:whether
B:if
C:that
D:what
B:if
C:that
D:what
正确答案是:
同类题型
.Each of you ______ responsible forthe accident.
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The conference will begin in an hour;_______, let’s have a rest
Color of skin and sex are hardly relevant _____ whether somebody is suitable for a job
Information obtained from libraries is sooner forgotten than ____