.I think necessary a foreign language.A. that; learningB. it; to learnC. that’s; to lear

问题补充：

.

I think necessary a foreign language.

A. that; learning

B. it; to learn

C. that’s; to learn

D. it’s; learn

答案：

A. that; learning

(答案→)B. it; to learn

C. that’s; to learn

D. it’s; learn

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