–The plane is due to take off at 7:50 from the airport.
–________ we fail to arrive there in time. –Try to take another flight then.
| A．What if | B．As if | C．Even if | D．Only if |
In fact, more and more people ____ to live a greener, healthier and more environmentally “green life”.
| A．chose | B．choose | C．are choosing | D．have chosen |
—Did you know any French before you arrived in Washington?
—Never ____ it, actually.
| A．had I learned | B．have I learned |
| C．I learned | D．was I learning |
____ the search engine just gave me some brief introductions rather than the whole content of the book to read.
| A．Luckily | B．Mostly | C．Funnily | D．Disappointingly |
The program is like a window on the world ____ you sit by it and fix your attention on what it shows.
| A．if | B．as | C．while | D．unless |
—Ms Lin looks rather a kind lady.
—But in fact she is cold and hard on us. You ____ believe it!
| A．shouldn’t | B．wouldn’t | C．mustn’t | D．needn’t |