George is going to talk about the geography of his country, but I’d rather he _______ more on its culture.
| A．focus |
| B．focused |
| C．would focus |
| D．had focused |
It’s ten years since the scientist ____ on his life’s work of discovering the valuable chemical.
| A．made for | B．set out | C．blocked out | D．turned up |
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.
| A．不填；the | B．the；a | C．a; 不填 | D．a; a |
We should get prepared for dealing with ________problems_________.
| A．any, arise | B．which, are arisen | C．whatever, arise | D．what, are arisen |
---You’ve read the Frog by Moyan , haven’t you?
---Yes, I_______ second time and I got a better understanding.
| A．have read a | B．had read the | C．will read the | D．read a |