I am not a little tired today after giving the room a thorough cleaning and I have never had ______today.

There _____ some milk in the bottle.

I worked on the problem ____ a long time and I worked it out ____ myself ____ last.[ ]

_____________ will the students be back from Qufu?-In about half an hour，I think. [ ]

It’s the office! So you ________ know eating is not allowed here.—Oh, sorry.