1.We are not sure___there are many strange animals on Mars.

1.We are not sure___there are many strange animals on Mars.
A.whether B.that C.what D.where
2.Please turn off your mobile phones.The plane will____soon.
A.get on B.get off C.take off D.take on
3.From now on,he does everything____.
A.more and more careful B.more and more carefully
C.much and much careful D.more carefully and more carefully
4.Tim jumped___high that he won the first prize in the sports competition.
A.such B.so D.too D.very
5.--I'll go to the Philippines during my winter holiday.
--Oh,that's great._____.
A.I'd like to B.Have a nice trip C.You are good D.Help yourself