you call me to say you’re not coming I’ll keep waiting for you at the theatre.A. UnlessB

问题补充：

you call me to say you’re not coming, I’ll keep waiting for you at the theatre.

A. Unless

B. When

C. If

D. As

答案：

(答案→)A. Unless

B. When

C. If

D. As

解析：连词辨析。A除非；如果…不；B当…时；C如果；D随着；句意：如果你不打电话告诉我说你不来，我还在电影院的门口等你的。故A正确。