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It’s difficult English well. We must work hard. A. learn B. learns C. study D. to learn 【查看更多】

 

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It's difficult _____ English well. We must work hard.

[     ]

A. learn
B. learns
C. study
D. to learn

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It’s difficult ________ English well. We must work hard.

A. learn  B. learns   C. study   D. to learn

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It’s difficult  _________ English well．We must work hard．

A．learn       B．learns          C．study            D．to learn

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