It was some time ________ we realized that we lost the chance forever.
| A．after | B．until | C．before | D．since |
Tom asked the candy makers (糖果制造商) if they could make the chocolate easier____ into small pieces.
| A．break | B．breaking | C．broken | D．to break |
Scientists are convinced______ the positive effect of laughter______ physical and mental health.
| A．of ; at | B．by ; in | C．of ; on | D．on ; at |
The prize will go to the writer______ story shows the most imagination.
| A．that | B．which | C．whose | D．what |
If we sit near____ front of the bus , we’ll have______ better view.
| A．/, the | B．/, a | C．the, a | D．the, the |
---Do you need more beef steak?
---______.
| A．Not exactly | B．Hold it | C．You ‘re welcome | D．No, thanks, I’m full |