问题

Not all the patents________ have been recognized.

A:to be examined
B:being examined
C:examined
D:having been examined

正确答案是：

同类题型

is good at languages , _______we all know

No one knows ____________ in fifty years.

It’s reported that she will appear asa judge in the movie

I’ll stay at home instead of ____ basketball with my friends.

She got her first science fictionpublishedIt turnedout to be _________—when was that —It Was in 2008__________ she was still incollege