1.________ so many woods, there is a danger of fire
A.For
B.In
C.With
D.By
2.A healthy life is generally thought to be ________ with fresh air, clean water, and homegrown food
A.joined
B.bound
C.involved
D.associated
3.I didn’t know what to do at first but then an idea suddenly ________ to me
A.happened
B.entered
C.occurred
D.hit
4.I’m pleased to receive your letter of April 10, ________ for our catalogue and price-list
A.ask
B.asked
C.asking
D.to ask
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