During the winter sleep, black bears always______.A．sleep like other woodland animalsB．kee

What is the situation of your brain during the sleep before an exam？A．It is deeply relaxed

Why do people sometimes have trouble sleeping？A．Because they fail to rest during the day.B

According to the news item, when did the snow drop？A．In the middle of winter.B．Just before

Speaker A: Do you think the weather next winter will be better than this winter？ Speaker B

Race relations during the 1960s changed considerably and no longer would the blacks accept

She often sleeps during the day time, because her work is on night _____.A.turnB.shi