---Why not stop __________ a rest?--- Oh, it’s so exciting that I can’t stop ____________ the model plane.
.If you meet some new words, you can _____ in a dictionary.
---How do you study ____the final test? ---I study ____ working with a group.
--I’m worried about my math exam. ---______.I believe you can pass it.
A group of middle school students spent two weeks ____the jungle.
She doesn’t have a pen ____.