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—It’s important ________ us _______ learn English well.

—I agree with you. We should try our best to learn it.

A. to,? to????????????? B. to,? for????????????? C. for,? to

____ important to learn English well.

A. That’s    B. It’s   C. It has   D. That has

____ important to learn English well.

A. That’s　　B. It’s　　C. It has　　 D. That has