28. ____well prepared you are ,you still need a luck in mountain climbing .
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 |
To my great disappointment, my best friend left the city I could have a word with her.
| A．before | B．after | C．while | D．until |
The stadium is very splendid and attractive in appearance, may be imagined.
| A．it | B．what | C．as | D．that |