题目

我国四大地理区域中绝大部分位于第二阶梯上的是 A．北方地区       B．南方地区              C．西北地区              D．青藏地区 答案：CDon’t worry about the child. Next to him ______ a lady, _____ he can turn when he is in trouble. A．sits; whom                              B．sits; to whom C．is sitting; with whom                      D．was sitting; to whom