There are different kinds of presents in the gift shop. I can’t decide _______.
| A．to buy what | B．to buy which |
| C．what to buy | D．which to buy |
—Let’s visit the sick children in hospital and ______.
—OK, let’s go.
| A．put them up | B．set them up |
| C．fix them up | D．cheer them up |
—What are you listening to?
—A song by Huo Zun. It ______ beautiful.
| A．tastes | B．sounds |
| C．looks | D．smells |
—I’m busy with my schoolwork these days.
—That’s great! You won’t get good grades ______ you work hard.
| A．if | B．because |
| C．unless | D．after |
—Whose pencil box is this?
—It _____ be Tom’s. It has his name on it.
| A．must | B．may |
| C．might | D．can’t |
—______ do you surf the Internet?
—About twice a week.
| A．How soon | B．How often |
| C．How long | D．How far |