Mr. Smith, together with his sons, supper at 7 o’clock yesterday evening．
A. was eating
B. were eating
C. was eat
D. were eat
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(答案→)A. was eating
B. were eating
C. was eat
D. were eat
解析：考查时态和主谓一致。句意“昨晚七点时，史密斯先生正在和他的几个儿子吃晚饭。”过去某一时刻发生的事情，用过去进行时；together with连接几个词作主语时，句子的主语跟最前面的那个词一致。故选A。