－Are those his friends? －________.
| A．Yes, those are | B．No, they aren't |
| C．Yes, they aren't | D．No, those aren't |
—What do you think of Liu Huan?
—Oh, he is my favorite singer. I think no one can sing________.
| A．good | B．well | C．better | D．best |
Everybody should remember it is not _________ to swim in the river alone．
| A．healthy | B．safe | C．possible | D．comfortable |
Some students are so ______ that they often make mistakes in their homework.
| A．careful | B．serious | C．careless | D．successful |
It’s about 5 away from here to the mountain.
| A．hundred meters | B．hundreds meter |
| C．hundreds meters | D．hundred meter |
—Which do you like , summer or winter?
—I prefer summer.
| A．good | B．well | C．better | D．best |