What kept Cameron from reaching the trench walls?
A.He didnt bring any bait.
B.The sub was too crampeD.
C.He was afraid of running out of the power.
D.Ron Allum advised him not to do that.

A.He
B.
B.The
C.
C.He
D.
D.Ron
E.

【参考答案】

C
C线索词：keptCameronfromreachingthetrenchwalls定位处：第十六段第二句。......

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