--- Do you know Uncle Tom is crazy about gardening?
---Sure. He ____ his flowers in the garden now.
| A．may be watering | B．must be watering |
| C．could look after | D．ought to watch |
The teacher asked the students to do the experiment __________ small groups.
| A．to | B．for | C．on | D．in |
The website is very popular. And it’s amazing that __________ designer of it is just __________ nine-year-old child.
| A．the; the | B．a; the | C．the; a | D．a; a |
I think_____ impresses me about his painting is the colors he uses.
| A．who | B．that | C．which | D．what |
I don’t really like the author _____ I have to admit his books are very exciting.
| A．until | B．unless | C．although | D．once |
---When shall I call, in the morning or afternoon?
----_____. I’ll be in all day.
| A．Any | B．None | C．Neither | D．Either |