1.Tom's family ( )their holiday in Beijing next week

題目：

1.Tom's family ( )their holiday in Beijing next week
A.are to enjoy B.will be enjoying 爲啥不選A?不是都表將來嗎
2.the play had alreday been on for quite some time when we ( ) at the theater
A.have arrived B.arrived
能不能詳細說明爲啥不選A

解答：

1,表不定的計劃或將來發生的事情,具體見這個http://zhidao.baidu.com/question/193160136.html?an=0&si=1
2.大哥A是現在完成時吧,句子都是過去式.