It’s reported that Tu Youyou won the Nobel Prize. We ______ her.
A. are surprised at
B. are known for
C. are proud of
—The song Where did the time go ________ the old days and the love of family.
—Sure. It’s my favorite song.
| A．helps us out | B．reminds us of |
| C．lets us down | D．regards us as |
—Mom, must I take out the trash now?
—No, you ________. You may take a rest first.
| A．mustn’t | B．can’t |
| C．shouldn’t | D．don’t have to |
—Smart phones are more and more popular now.
—So they are. But they still ________ too much.
| A．pay | B．cost |
| C．take | D．spend |
It’s very friendly ________ him to help me when I’m in trouble.
| A．of | B．with |
| C．to | D．in |
________ we deal with our problems, we can easily become unhappy.
| A．Until | B．If |
| C．Unless | D．Though |