Sometimes parents find ______ hard to communicate with their children.
A. thisB. thatC. itD. one
Nowadays scientists are working hard to find out ______ to do with air pollution.
A. howB. whyC. whenD. what
Good teachers can usually give the students______ advice on their study.
A. a great manyB. huge amounts of
C. a large number of D. too many
Chinese people have been using paper for over______ years.
A. thousandsB. two thousandC. thousands of D. thousand
Mother came into my study with a cup of milk in one of her hands, and an apple in ______.
A. the othersB. otherC. the otherD. another
______ amazing the Disney film Frozen is!
A. HowB. WhatC. What aD. What an
