A、 discussed
B、 is discussing
C、 was discussing
D、 has discussed
答案:B
A、 discussed
B、 is discussing
C、 was discussing
D、 has discussed
答案:B
A. 正确
B. 错误
A. 10
B. 10.5
C. 11
D. 11.5
A. Although
B. Unless
C. If
D. Because
A. 搭乘前应系紧鞋带,留心松散、容易飘起的服饰,以防被挂
B. 在入口处,按顺序依次搭乘,不能相互推挤
C. 沿着自动扶梯的扶手滑下去
D. 不在出口处逗留,以免影响其它乘客的到达
A. [4, + ∞)
B. [3,+ ∞)
C. [2, + ∞)
D. R
A. 正确
B. 错误
A. 2
B. 3
C. 4
D. 5
A. {x|x≥3}
B. {x|2≤x<3}
C. {x|x≥2}
D. {x|x≥4}
A. crazy
B. lonely
C. hungry
D. sleepy
A. visit
B. visited
C. have visited
D. will visit