Question

Not only his parents but also his brother           to the Summer Palace. They will be back next week.

A．have been

B．have gone

C．has gone

D．has been

Answer 1

C

不但他的父母而且他的兄弟都去了颐和园，下一周将返回，表示某人去了某地在路程当中通常用have或has gone to+地点，not only……but also作主语时谓语动词采用就近原则，最近的是单数第三人称his brother，故谓语部分中的助动词用has，故选C。Have或has been表示某人去过某地，现在不在外地，与本题意思不符。