【小题1】I think there is no ________ (联系) between the two things.
【小题2】Sandy _________(争论) with her brother about this question just now.
【小题3】They will visit the country again at a _________(恰当的) time.
【小题4】—I am not clear about this question. Can you ________it for me?
—Sure.
【小题5】There are lots of black _______in the sky. I think it's going to rain.
【小题6】Betty is really a shy girl. She always feels ________when she speaks in front of people.