(1)I often listen to tapes to i_____my listening skills.

(1)I often listen to tapes to i_____my listening skills.

题目
(1)I often listen to tapes to i_____my listening skills.
(2)He's been singing for five years.(改为同义句)
He began to sing_____ _____ _____.
答案
1 improve 提高
2 five years ago 五年前(根据began 一般过去)
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