问题

Yesterday Frank worked deep into the night, this is the second time this week he’s stayed up,____ ?[ ]

A: didn't he
B: isn't it
C: isn't this
D: hasn't he

正确答案是：

同类题型

Let us hope we can settle the matter without _____ more trouble.

_______are they doing一Theyare running．

We have all become addicted to(对…上瘾) sugar, particularly in soft drinks. Today,sugar consumption is ______ it used to be.

Many people believe that hunger is only a problem in the developing world. ______, it is a problem all over the world.

It’s easy to _________ this camera , while putting the pieces together is quite difficult, so you must keep the directions well.