Line ____ from younger to older. A.up B.to C.at
The students couldn't help ______ when they heard the joke.A. to laugh B. laugh C. laughing
Do you know ______ this word?A. what to spell B. how to spell C. to spell
Be quiet! The babies ________.A. sleep B. are sleeping C. slept
He asked me _____ I would like a cup of tea.A. that B. what C. If
找出下列英文单词所对应的中文意思。