When a friend was visiting David, it began (41) . So David told him (42) that night. "You may stay here (43) the night," he said. "OK", answered his friend. But (44) minutes (45) , the friend went out. He didn’t tell David where (46) going nor (也没有) did he ask for an umbrella. When David was about (47) , his friend (48) . He was all wet through. "Where (49) you (49) "asked David. "I have been (50) "answered the friend, "to tell my mother that I’ll not go home tonight because of the rain.\