—What time do you usually go to school?—I usually go to school________six o’clock.A.inB.atC.on
---- Could you tell me how long ______ the book? ---- Three days.
When you see the sign “EXIT”, you know you can ________ from here.
---- How much did your bike _______? ---- I ________400 yuan for it.
Remember not to speak ________ when we are in the reading room.
Listen! They ________ about the earthquake in Japan. Let’s join them.