Question

Not only the parents but also their child __________ the Bird’s Nest next week.

A．have visited

B．is going to visit

C．are going to visit

D．have been to

Answer 1

B

：考查主谓一致。Not only...but also...连接并列的主语，谓语动词使用就近原则。即跟their child 一致，用单数。故选B。另外从next week可知用将来时，也可以排除A,D。 
点评：英语中主谓一致用法比较多，但也有相应的原则，对于这些问题除了牢记，几乎没有其他捷径。