Frankly speaking, ________ of them knew what the other was doing that morning.

 (2012·南宁高二检测) He didn’t make _______ clear when and where the meeting would be held.

—Did you see Peter and Mike?
— No, I saw ______of them.

________is a pity that you forgot both her address and her telephone number.  

— May I have some more tea with sugar，please?
—I'm sorry，but there doesn't seem to be________.

—Silly me! I forget what my luggage looks like?
—What do you think of________over there?

—Don't you think the equipment is worth buying?
—Worth buying？I don't think there is________the one we 　saw in the advertisement.

One of the most important problems they had to consider was________of public health.

As for me, few excitements can beat ______of being admitted to my favorite university.

Half of ________ surveyed in 16 countries say they go first to their closest friend to share their deepest wishes and darkest fears.