---Mother: Bob is sure tonigh.---Father: Don't be so sure it.A.to come ; abo
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---Mother: Bob is sure ______ tonigh.
---Father: Don't be so sure ______ it.
A.to come ; about
B.to come; of
C.will come; for
D.coming; with
试题答案
B
be sure to do sth. 一定, 必然; be sure of/ about…确信, 有把握.