He was very sick and his life was hanging by a ______.
A. rope
B. thread
C. cord
D. string
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He refused to disclose ______, on the grounds that it would be a breach of confidence.
A. that had told him
B. what had told him
C. what had been told him
D. that had been told him
They are taking ______ steps in preparation for a possible war.
A. primitive
B. preliminary
C. productive
D. progressive
He drew on his cigarette and blew out a ______ of smoke.
A. flash
B. stream
C. storm
D. circle
The beauty of Venice largely ______ the style. of its ancient buildings.
A. consists in
B. relies on
C. composes of
D. comprises in