—I looked after a group of fifteen French children.
—That _________ easy!
| A．mustn’t be | B．mustn’t have been |
| C．can’t have been | D．wasn’t |
Mary came in , _____ by her dog.
| A．following | B．to follow | C．followed | D．to be followed |
I failed in the final exam last term and only then ______ the importance of studies.
| A．I realized | B．I had realized | C．had I realized | D．did I realize |
I hated practicing, but I stuck_______ _it and now I can play pretty well.
| A．to do | B．to doing | C．do | D．doing |
I smell something ________in the kitchen. Can I call you back in a minute?
| A．burning | B．burnt | C．being burnt | D．to be burnt |
Is that a book in farming? ________,I want to borrow it.
| A．So it is | B．If so | C．So is it | D．So if |