Some travelled right into the heart of Africa guessing where the River Nil andit where it went.
| A．began;followed | B．might begin;following |
| C．begins;follows | D．must begin;followed |
—Why not find a new job?
—Why should I? I _____ as much, but I like what I'm doing.
| A． didn't earn | B． don't earn |
| C． hadn't earned | D． haven’t earned |
Mom, don’t you think it’s OK to play once in a whileit doesn’t affect my studies?
| A． even if | B． unless |
| C． so that | D． as long as |
The scientist spent years alone in the forest, ______ by eating wild fruit and small animals.
| A． surviving | B． survived |
| C． to survive | D． having survived |
—Wow, you have a really good voice. I_____ you were good at singing.
—Thank you.
| A． haven’t known | B． hadn’t known |
| C． didn’t know | D．don’t know |
The main street is lined with small stands and shops _____ sell almost anything you can imagine.
| A． what | B． where | C． who | D． which |