My uncle is a doctor. He sometimes has to work _______ night.
—Mr. Smith, would you please speak a little more ________?—Sorry! I thought you could follow me.
—Our school is going to hold the ________ Culture Festival. —Yes! And we can take part in ________ activities.
—Are these books ________? —No, they are not mine. They belong to ________.
—I’ve practiced a lot, but my spoken English isn’t improving. What should I do?—Why don’t you ask your teacher for his ________?
Betty is going to London. But I don’t know ________.