. Charles Babbage is generally considered _______ the first computer.
| A．to invent | B．inventing | C．to have invented | D．having invented |
__________ you’ve grown up, you should not rely on your parents.
| A．That | B．So that | C．For | D．Now that |
He _______ speak to his mother like that.
A ought not to B. doesn’t ought to C not ought to D ought to not
--- Isn’t that Jessica’s brother over there?
--- No, it _______ be him. I’m sure he doesn’t wear glasses.
A. can’t B. must not C won’t D may not
She was fired by the boss because she failed to ___________ for work on Monday.
A. turn up B. turn down C. turn on D turn out
Great changes _________ in China in the last two decades.
| A．have taken place | B．took place |
| C．have been taken place | D．are taking place |