( ) The students couldn't help ______ when they heard the joke. A. to laughB. laughC. laughing
一Here’s interesting storybook for you. —Thank you.
I've got a nice present.It’s a skateboard.It’s my parents.
Look at that sign,it means we shouldn’t noise here.
Are there public signs in the park?
一 is your birthday? 一It’s on the l5th of December.