Without the friction (摩擦力) between feet and the ground, people would ______ be able to walk.
The manager was rushing to the airport so he______the report the secretary had typed.
We expected 50 people to take part, but the_____number was a lot higher.
Although her ability in art has not yet developed, she has great____ as an artist.
- She got into a(n) _____when she thought she'd forgotten doing homework.
---How much will I pay for a night? ---Prices_____from room to room.