I won’t talk to him _______ he talks to me first.我不会跟他说话，除非他先跟我说话。
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We can surely attain our goal _______ we are united as one.只要我们团结一致，我们肯定能实现我们的目标。
You can use the car _______ you return it tomorrow.你可以借用这辆车，条件是明天得归还。
_______ she finds out, what shall we do then?
下列哪个简单析取式是重言式（）
A. pÚØq
B. pÚq
C. ØpÚq
D. pÚØp
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