We should do some things to protect the environment.For example,we shouldn’t________too many trees.
—Can you ______ my English tapes to me, Mom? —OK!
—Is that your father?—No. It’s my uncle, my mother’s _____.
We have four classes ______ the morning.
含有相同音素的一组字母是______。
We should save water because people can use water to make _____. A. energy B. sound C. rain