─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 |