问题

The new means of transport ________ in this city, so whether it will work out remains to be seen

A:have never tried
B:has never tried
C:have never been tried
D:has never been tried

正确答案是：

同类题型

A: I’m really sorry to have broken your beautiful vase.B: ________

What do you think of the lecture made yesterday—-Excellent! _______ you missed such a wonderful lecture

You shouldn’t judge a stranger only __ the clothes he wears

The ___________ you drive, the _____________ you will be.

I knocked on the door but ______answered.