单选题 Dr. Smith, together with his wife and daughters,______ visit Beijing this summer.
A. is going to B. are going to
C. was going to D. were going to

【正确答案】 A

【答案解析】[解析] 句子的主语是Dr．Smith，是第三人称单数，“together with his wife and daughters”的前后都有逗号隔开，就是很明显的插入语的标志。排除B项和D项。由“this summer”可知应该用一般将来时态。故选A。