摘要： semester

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Last semester, he had a hard time______ English.

A.
learns
B.
learning
C.
to learn
D.
learnt

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－Last semester, he had a hard time______ English.

A．learns

B．learning

C．to learn

D．learnt

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－Last semester, he had a hard time______ English.

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－Last semester, he had a hard time______ English.

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－Last semester, he had a hard time ________ English．

A．learns

B．learning

C．to learn

D．learnt

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