问题补充:
.The other day I was showing the boys the weekly chemistry experiment when, I knew it, the mixture was bubbling over everywhere.
A. if
B. before
C. though
D. unless
答案:
A. if
(答案→)B. before
C. though
D. unless
解析:可联系答.案.网客服索取。
时间:2023-11-27 06:14:24
.The other day I was showing the boys the weekly chemistry experiment when, I knew it, the mixture was bubbling over everywhere.
A. if
B. before
C. though
D. unless
A. if
(答案→)B. before
C. though
D. unless
解析:可联系答.案.网客服索取。
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