The students couldn’t help ________ when they heard the joke.A.to laugh B.laugh C.laughing
What is ________ doing? A. she B. her C. your
I’m working ____ my computer. A. in B. at C. on
Dad, ______ is a call for you. A. haveB. there’s C. there
Mom is ______ a letter. A. writing B. write C. writeing
I am talking ____ you. A. forB. to C. on