---How about paying a visit to Mr. Richardson, our former history teacher?---Good idea. I will e-mail him today so he ______ know ______ to expect us.A.may,whenB.would, whyC.will, howD.shall, why
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A解析may用在so、so that、in order that后常表目的。“我”给他发封 e-mail，这样他就可以知道什么时候接我们了。故选A。