摘要：( ) It's difficult your sound because the noise is too high. A. to listen B. to know C. to learn D. to hear
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It’s difficult ______ your sound because the noise is too high.
- A.to listen
- B.to know
- C.to learn
- D.to hear
It's difficult _____ your sound because the noise is too high.
[ ]
A. to listen
B. to know
C. to learn
D. to hear
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B. to know
C. to learn
D. to hear
It’s difficult _____ your sound because the noise is too high.
A. to listen B. to know C. to learn D. to hear
查看习题详情和答案>>
It’s difficult _____ your sound because the noise is too high.
| A．to listen | B．to know | C．to learn | D．to hear |