问题补充:
.He walked down the hills, softly to himself.
A. sing
B. singing
C. sung
D. to sing
答案:
A. sing
(答案→)B. singing
C. sung
D. to sing
解析:可联系答.案.网客服索取。
时间:2019-08-16 19:02:51
.He walked down the hills, softly to himself.
A. sing
B. singing
C. sung
D. to sing
A. sing
(答案→)B. singing
C. sung
D. to sing
解析:可联系答.案.网客服索取。
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