Swimming is, of course, interesting. But ______ we plan to go swimming, being safe must come first.
- A.though
- B.when
- C.unless
正确答案及解析
正确答案
B
解析
句意：游泳当然很有趣。但是当我们计划去游泳时，安全必须放在第一位。
考查连词辨析。though尽管；when当……时；unless除非。根据题意“____我们计划去游泳，安全必须放在第一位”，结合选项可知此处用when符合题意，在句中引导时间状语从句。故选B。
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