—Dad，must we wait until the light becomes green？
—Yes，I’m afraid we ________．That’s the traffic rule．

I have ________ homework to do this evening．

He has to be ________ bed ________ nine o’clock．

—What do you usually do in the morning？
—I often practice ________ English．
A．speak
B．to speak
C．speaking

—What’s your teacher like？
—She is always strict ________ us．
A．in
B．with
C．to