21. In the reading room, we found her ________ at a desk, with her attention ________ on a book.
A. seating; fixing B. seated; fixed C. sitting; fixing D. to sit; fixed
22. ________ that China has the largest population in the world.
A. It’s no question B. There’s no question C. It’s no doubt D. There’s no doubt
23. – What did he want to know, Jack?
- ________ that we would have the picnic on Sunday.
A. what it was B. when it was C. whether it was D. where it was
