I think Tom, as the head of a big department, should either study regularly or ____his job.
It’s ten years since the scientist ____ on his life’s work of discovering the valuable chemical.
Fruit _______ several kinds of vitamins, ________ vitamin C. A. contains; includedB. forms; including C. forms; containingD. contains; including
The development of industry has been ______ gradual process throughout ______ human existence, from stone tools to modern technology.
We should get prepared for dealing with ________problems_________.
---You’ve read the Frog by Moyan , haven’t you? ---Yes, I_______ second time and I got a better understanding.