—How often do I need to feed the fish?-They _______ food every day, or they will be hungry.
How many ________ are there in the school? A. librarys B. classes C. glass
There are four ________ students in our school. A. hundred B. hundreds C. hundreds of
Which is short for (缩略) “television (电视)? ” A. UN B. TV C. IQ
There are some __________ on the hill.A. apple tree B. apple trees C. apples tree
—What is your mother? —__________.A. She is my mother B. She is a policeman C. She is a nurse