________is no doubt that today greenhouse gases are the largest human influence on global climate.
| A．It | B．There | C．This | D．That |
——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 |
Will you see to ____ that my birds are looked after well while I’m away?
| A．them | B．yourself | C．it | D．me |