—You were brave enough to say “No”at the meeting.
—Well,now I regret________ that .
| A．to do | B．to be doing |
| C．to have done | D．having done |
—_______? —My watch doesn’t work.
| A．Why are you here | B．How do you do |
| C．What’s wrong | D．What’s this |
I won’t leave here until my mother _______ back.
| A．will come | B．is coming | C．came | D．comes |
We really don’t know _______. Could you help us?
| A．how to do | B．what to do |
| C．to do what | D．to do how |
—Will you please ________ do that? —OK, I won’t.
| A．won’t | B．not | C．don’t | D．can’t |
We had fun ________ the robots do many different kinds of things.
| A．to watch | B．watched | C．watching | D．watches |