问题

Susan won’t arrive at the airport on time _____ she hurries up.

A:once
B:if
C:or
D:unless;

正确答案是：

同类题型

Please.The boy is studying.

Beneath our feet ______ that our life depends on for food and clothing.

The man______ you talked just now is a worker[ ]

Mary and Jane are both very quite, but ______them, their younger brother Tom is quite naughty

IthinkI’m_____unhealthy.