The students couldn't help ______ when they heard the joke.A. to laugh B. laugh C. laughing
( )(5)My father is _____. A. write B. sing C. writer
( )(4)They love ____ A. our B. we C. us
( )(3)We love _____ father and mother . A. we B. us C. our
( )(2)Here is a picture _____ my family . A. to B. of C. from
( )(1)I'm _____ Class Two. A. at B. on C. in