We cannot live _____ air.
| A．with | B．without | C．of | D．for |
I saw _____ boy walking across _____ street today.
| A．a, a | B．the, the |
| C．a, the | D．the, a |
What do you think ______solve the problem?
| A．you can do |
| B．can you do |
| C．you can do to |
| D．can you do to |
Thank you ________ giving me so much help.
| A．to | B．for | C．with | D．in |
That storybook is very _________. The children are _________ in it.
| A．interesting; interest |
| B．interest; interested |
| C．interesting; interested |
| D．interested; interesting |