He had just sent an email to his pal on the Internet ________ the system broke down.
A．while B．when C．after D．since
While intelligent people can often ______ the complex, a fool is more likely to complicate the simple.
A. sacrifice B. substitute C. simplify D. survive
People develop ________ preference for a particular style of learning at ________ early age and these preferences affect learning.
A. a；an B. a；不填 C. 不填； the D. the；an
I know you are very ____ice-cream, but you will gain weight if you eat too much.
A. fond of B. tired of C. full of D. afraid of
I don’t think she is a nice woman; I am _____ her empty talk.
A. grateful for B. tired of C. crazy about D. concerned about
_____ your classmates and you will make more good friends.
A. Worry about B. Fall in love with C. Think about D. Get along well with
