— We did not see him at the lecture yesterday．
— You _______ him, since I went to an international conference with him．
| A．mustn’t have seen | B．can’t have seen |
| C．couldn’t see | D．needn’t have seen |
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 |
Catching________ sight of a policeman coming here, the thief hurried out of________ sight.
| A．/ ; / | B．the ; / | C．/ ; the | D．the ; the |
I’m excited that my parents_______ of me having a travel to Africa.
| A．agreed | B．promised | C．allowed | D．approved |