To plant the tree, we must dig ______.[ ]A. a three feet deep hole B. a t

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To plant the tree, we must dig ______.[     ]
A. a three feet deep hole
B. a three-feet-deep hole
C. a hole three-foot-deep
D. a hole three feet deep

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举一反三

It is _ _ for students to protect our environment. [ ]
A. possible
B. impossible
C. bad

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—Do you know why we must keep a lot of green plants?
—Sure, I do. Green plants can hold water and keep the earth _     .               [     ]
A. dry
B. wet
C. warm

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—What can we do for the Asian Games in Guangzhou this year?
—We can collect        _ paper and bottle in the public places.              [     ]
A. writing
B. waste
C. good

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The endangered animals are like _       textbooks for young people.                 [     ]
A. living
B. to live
C. dead

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The furry panda is so      _ that we want to see it again.              [     ]
A. ugly
B. terrible
C. lively

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