He doesn’t know ________ they will plant trees on Saturday or not.
| A．if | B．whether |
| C．where | D．how |
Don’t ________about things so much.It will make you stressed out.
| A．afraid | B．terrify | C．terrified | D．worry |
My parents often about my health.
| A．care | B．learns | C．talks | D．thinks |
If Iyou , I’d wear a shirt and tie.
| A．are | B．was | C．were | D．is |
Don’t laugh ___ others.You should help them when they are in trouble.
A.at B.to C.of
Sixteen-years-olds shouldn’t ______ to go to an Internet bar.
| A．be allowed | B．be allow | C．allow | D．are allowed |