______ is a metal stand that keeps books from falling over on the shelf
举一反三
- is a metal stand that keeps
- The pile of books fell down from the shelf and ______ all over the floor. A: scattered B: slipped C: extended D: separated
- This light shelf is strong enough to _____ all the books here.
- I haven't done my homework in a long time. I'm ___________________. A: falling B: falling over C: falling backwards D: falling behind
- To obtain a sample of 10 books in the store, the manager walked to the first shelf next to the cash register to pick the first 10 books on that shelf. This is an example of a