—Wow! It snowed last night. What a nice world!—You're right. But it's more diffi

题干

—Wow! It snowed last night. What a nice world!
—You're right. But it's more difficult to find my missing keys with snow________ the ground.

A．covered	B．cover
C．to cover	D．covering

上一题下一题 0.65难度单项选择更新时间:2014-11-04 09:41:10

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