问题
选择题
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
答案
答案：B
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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
答案：B
