起重机械制造许可证书有效期为()年
A、6
B、4
C、3
D、2
参考答案:B
—Did you enjoy your holiday?
—Yes, it’s the best holiday I ___________ these years.
A.had
B.have had
C.had had
D.would have
袜子和鞋子二者颜色应为()。
A.袜子颜色浅于鞋子
B.鞋子颜色深于袜子
C.鞋子颜色浅于袜子
D.袜子颜色深于鞋子