It is said that potato chips ____________ by mistake about a hundred years ago.
| A．invent | B．invented | C．are invented | D．were invented |
His father looks _________ and he is looking ________ at his son.
| A．happy; happy | B．happy; happily | C．happily; happy | D．happily; happily |
--- I didn’t see you at the party yesterday. Why?
--- Because I ________ for an important person from America at that time.
| A．was waiting | B．is waiting | C．will wait | D．have waited |
I hope you __________ in this city for a few more days.
| A．to stay | B．stay | C．will stay | D．staying |
Have you _________ the story before?
| A．heard about | B．heard | C．listen about | D．heard from |
We ________ the whole day in Disneyland yesterday.
| A．took | B．spent | C．cost | D．knew |