Failure often occurs in our life. Keep ______ about the future, and you will achieve the goal you set sooner or later.
| A．thankful | B．skeptical |
| C．optimistic | D．successful |
My friends __________ come to see me. I don’t want to go out in case they come.
| A．can | B．must | C．may | D．will |
You may drop in or just give me a call. _________ will do.
| A．Either | B．Each | C．Neither | D．All |
— How do you want your eggs?— ______.
| A．They taste good | B．I want them very much |
| C．I’d like some cakes | D．Fried, please |
— Tell me your secret. — I ______. It wouldn’t be a secret if I told you.
| A．won’t | B．needn’t | C．mightn’t | D．couldn’t |
Even after I ______ to soil science, I sometimes wondered whether 1 was doing what I wanted to do.
| A．reacted | B．switched | C．adjusted | D．contributed |