题型：问答题 — Hello, I ____ to ask if I can book two tickets for tonight's film. — sorry, we've already sold out.[ ]A. phone B. will phone C. am phoning D. have phoned 查看答案
题型：问答题 It's the first time that he has been to Australia, _____?A. isn't heB. hasn't he C. isn't it D. hasn't it 查看答案
题型：问答题 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 查看答案
