The policemen are investigating the murder______.
A.event
B.case
C.incident
D.accident
第1題
Mankind must first of all eat, drink, have shelter and clothing______ it can pursue politics, science, art, religion, etc.
A.later
B.before
C.when
D.if
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第2題
You will hardly believe it, but this is the third time tonight someone______me.
A.telephoned
B.has telephoned
C.telephones
D.should telephone
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第3題
This method saved half the labor that______to combat the insects separately.
A.would not have been needed
B.would have been needed
C.would not have needed
D.would have needed
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第4題
I______the woman who wears a red T-shirt somewhere before.
A.see
B.to have seen
C.have seen
D.saw
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