问题

Unless _____ to speak, you should remain silent at the conference [ ]

A: invited
B: inviting
C: being invited
D: having invited

正确答案是：

同类题型

1—_______ your friend havea tennis racket?—No, but hehas a great ping-pong bat collection.

We’re looking forward to _____ your school.

________me, good friends should have the same views as me.

________you’ve got a chance,you might as well make full use of it.[ ]

The beautiful mountain village _____we spent our holiday last year is located in _____ is now part of Guangxi.[ ]