初中英语动词单选题

Digital cameras are becoming very popular, though some still _____ too much.

A．pay

B．spend

C．sell

D．cost

Don’t make me _____ this or that. I’m too busy!

A．to do

B．do

C．doing

D．done

“Can you sing the song in English?” “No , I _________”

A．may not

B．mustn’t

C．needn’t

D．can’t