—Who will _______ the baby when your aunt is away?
—Nobody but me.
| A．look after | B．look at | C．look for | D．look up |
You must concentrate _____ your study not on your clothes.
| A．on | B．with | C．in | D．to |
There are so many beautiful clothes in the store. I really don’t know _____.
| A．what to choose | B．how to choose |
| C．when to choose | D．which to choose |
We all know the _____ of learning English well.
| A．important | B．importance |
| C．different | D．difficult |
The room must _____ up right now. It’s too dirty.
| A．be cleaned | B．be cleaning |
| C．clean | D．cleaned |
, the rain stopped when we went out for a walk.
| A．Lucky | B．Luck | C．Luckily | D．Luckless |