-- Has your friend completed his design?-- Not yet. He ________ on it last night.
| A．worked | B．was working |
| C． has worked | D．is working |
-There_______ a show next weekend. Would you like to watch it?
-Of course, I'd love to.
| A．is going to have | B．has | C．will be | D．will have |
We are happy_______ you to the party for our friends from Beijing.
| A．invite | B．invite to | C．inviting | D．to invite |
After reading for an hour, you'd better_______ the green trees for a minute or two.
| A．look out of | B．look out at | C．look out from | D．look for at |
Do you need help _______ your Maths homework?
| A．to | B．from | C．with | D．for |
Which floor do you_______ this tall building?
| A．live | B．live on | C．live in | D．live on in |