Rare species in the world, ______ by hundreds every year, must be jointly preserved by all countries, or humans will encounter ecological disaster in the near future.
| A．disappeared | B．disappearing | C．disappear | D．having disappeared |
It’s said that there are plenty of hotels in Shanghai. There _____ be any difficulty for you to find somewhere to stay.
| A．wouldn’t | B．shouldn’t | C．mustn’t | D．needn’t |
His pale face _________ a reluctant smile when he heart the news.
A took on B came on C was taken on D turned into
________one scientist has pointed out, children’s skulls are not fully developed.
| A．That | B．As | C．Which | D．What |
--- Hi, Kate, can I use your bike for a while this afternoon?
--- Sorry.??__________?.
| A．It’ s repaired? | B．It has been repaired |
| C．It’s being repaired? | D．It had been repaired |
---Do you know who invented ________ telephone?
---No. But it is really________ most important invention.
| A．/; the | B．the ;/ | C．/ ;a | D．the ;a |