健身健美操一套时间为（）分钟，竞技健美操一套时间为（）。
参考答案：4—5； 1"50"±5"
------ Is Peter there?
-----_______, please. I will see if I can find him for you.
A．Hold out
B．Hold up
C．Hold on
D．Hold in
– How many students did you see playing in/on the playground?
– ________
A．None
B．No one
C．Nothing
D．Nobody
