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。
（1）listen to the radio A 植物园
（2）bad cold B 樱花
（3）play chess C听广播
（4）botanical garden D 重感冒
（5）cherry blossomE 下棋
