1.(2009陕西) 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
解析：句意“Dr. Smith将在今年夏天和妻子女儿们一起游览北京”。本题考查主谓一致。由this summer可知本句应用一般将来时，故排除C、D；together with连接并列主语时谓语动词单复数应取决于其前面的主语，故选A。
2.(2008全国II) If their marketing plans succeed, they __________ their sales by 20 percent.
A. will increase B. have been increasing C. have increased D. would be increasing
1.(2009湖南) When he _______ the door, he couldn’t find his keys.
A. would open B. opened C. had opened D. was to open
解析：句意“当他要开门的时候，发现钥匙不见了”。was to do在此表示wanted to do或intended to do，would do在这里有情感意义，所以被排除。