It’s ten years since the scientist ________ on his life’s work of discovering the valuable chemical.
| A．madefor | B．tookoff | C．setout | D．turnedup |
The room is too small, there' s no enough ________for another desk.
| A．place | B．room | C．floor | D．ground |
He has searched the ________ or 2 hours for the information about Yang Liwei.
| A．mouse | B．keyboard | C．Internet | D．computer |
_________ mother is a worker.
| A．Mary and Mike's | B．Mary's and Mike's | C．Mary's and Mike | D．Mary and Mike |
At that time, he was studying in_______ university. And it was a famous one.
| A．/ | B．the | C．a , | D．an |
Our teacher told us that _______ moon moves around ______ earth, and
________ earth circles________ sun.
| A．a, a, a, a | B．an, an, an, an | C．the, the, the, the | D．/, /, /, / |