We are going for a picnic tomorrow. I'll call Wendy to make sure ________.A.why to startB.when to startC.what to startD.which to start
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B解析考查动词不定式作宾语。本题句意为：我们准备明天去野餐。我要给Wendy打电话弄清楚why to start“为什么出发”；when to start“什么时间出发”；what to start“什么出发”；which to start“哪个出发”。结合题意可知最佳