It’s possible_____ the old. We should often do so.
| A．of us to help | B．for us to help |
| C．of us helping | D．for us helping |
—White doesn’t look good _______ you,but you look cool _____ black.
| A．on ; on | B．on ; in | C．in ; in | D．in ;on |
—The green bag reminded the old man _____ the days when he was young.
| A．with | B．by | C．of | D．at |
—We find ______ impossible for us to learn a foreign language well in a short time.
| A．it | B．this | C．one | D．that |
—You should spend as much time as you can_____the piano.
| A．practicing playing | B．practice to play |
| C． practice playing | D． practicing play |
—Do you know ______ I could pass the exam? —Sorry, I‘ve no idea.
| A．that | B．which | C．what | D．whether |