Passengers

問題詳情：

Passengers ________ talk to the driver while the bus is moving, because it will take his focus off the road.

【回答】

mustn't　句意：當公共汽車開動時，乘客不得與司機交談，因為這將把他的注意力從路上轉移開來。此處表示“禁止，不允許”，故用mustn't。

知識點：虛擬語氣

題型：閲讀填空