He lay in bed, ____ a novel.
A. reading
B. reads
C. to read
D. having read
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____ how to deal with the problem, he returned to the teacher for help.
A. knowing
B. don't know
C. Not knowing
D. having known
______ any reply, he decided to write another letter.
A. Having received
B. Not have received
C. not receiving
D. Not having received
____ the path that leads out of the town, you will come to a thick wood.
A. Taking
B. Take
C. To take
D. If take
It rained heavily, ____ severe flooding in the area.
A. caused
B. causing
C. to cause
D. and caused
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