-Where have you been? -I got caught in t
题型：选择题
问题：
-Where have you been?
-I got caught in traffic；otherwise________sooner.[ ]
A．I would be here
B．I have been here
C．I had been here
D．I would have been here
题型：选择题
| 小明同学利用圆珠笔杆、钢丝、细绳制成了如图所示的滑轮组用其匀速提升重物，不考虑摩擦、笔杆和绳重，下列说法正确的是（ ） A．拉细绳的力F等于钩码重力G的 B．拉细绳的力F等于钩码重力G的 C．拉细绳的力F等于钩码重力G的 D．拉细绳下降的距离是钩码上升高度的  |
