---What color_____ the cats?
---I think ________white and black.
| A．are ,they’re | B．is ,they’re | C．is ,it’s | D．are ,it’s |
I saw Mary come to school _______foot.
| A．on | B．at | C．by | D．with |
Would you mind giving me a hand. I’m busy _______ the supper.
| A．did | B．to do | C．doing | D．do |
His money has run out, so he can’t _________ anything else.
| A．afford | B．provide | C．offer | D．support |
I’d like to try, _______ I may fail.
| A．though | B．since | C．until | D．after |
Though he lives _______, he never feels ________.
| A．alone; alone | B．alone; lonely | C．lonely; alone | D．lonely; lonely |