As the sea ice melts sooner each swimmer,polar bears are forced to come ashore earlier and face food shortages _____ they have stored enough fat to last them through the season.
| A．before | B．unless | C．since | D．until |
The letter he had been looking forward to at last.
| A．come | B．comes | C．coming | D．came |
“ You smoke in the bedroom”, Rose said to her hushand and pushed him out of the room.
| A．needn’t | B．mustn’t | C．dare not | D．won’t |
— May I open the window to 
let in some fresh air?
— .
| A．Come on | B．Take care | C．Go ahead | D．Hold on |
What surprised me was not what he said but he said it.
| A．the way | B．in the way that |
| C．in the way | D．the way which |
parents say and do has a life long effect on their children.
| A．That | B．Which | C．What | D．As |