─Do you know_____second-hand smoke? ─To protect our health and memory.
A. how we should prevent B. how we should prevent
C. why we should prevent D. whether we should prevent
We all know that we’ll meet all kinds of difficulties in our lives in the future. We should learn to be ________ any challenge!
A. confident enough to take on
B. active enough to take up
C. enough careful to take try on
D. enough patient to try out
—My cousin is good at all his subjects at school, but he never ________.
—What a ________ boy! We should learn from him.
A. gets off； thoughtful B. takes off； energetic
C. shows off； modest D. puts off； curious
My best friend Alex failed in the math competition. I’d like to _________.
A. dress him up B. pick him up
C. cheer him up D. get him up
It’s creative _______ you _______ this good idea.
A. of； to come up with B. for； to come up with
C. of； think of D. for； to think of
We all know that learning a foreign language ______ time and effort.
A. requires B. reduces C. removes D. repeats
