If you want to be healthier, you shouldn't do _____ in the classroom all the time but do more _____ on the playground.
A．exercise; exercises B．exercise; exercise
C．exercises; exercises D．exercises; exercise
They looked _____ each other and kept their secrets _____ themselves.
A．for; to B．at; for C．at; to D．out; at
Jack had a wonderful time _____ many interesting places in Beijing and he had much time __________ the city.
A．to visit; to enjoy B．to visit; enjoying
C．visiting; to enjoy D．visiting; enjoying
I have some problems __________ my homework. Could you tell me _____?
A．with; what the height of the mountain is B．in; what the height of the mountain is
C．with; what is the height of the mountain D．in; what is the height of the mountain
The girl _____ a smile on her face is always kind _____ others.
A．wears; to B．wearing; to C．wore; with D．wearing; for
This text is _____ easier and _____ interesting than that one.
A．more; much B．much; more C．more; more D．much too; more
