100. My cousin wants to be a scientist and_____ science of nuclear.

下列各句中，没有语病的一项是（ ）

―Who is ringing the doorbell. ―Maybe _ is your aunt.

ettyWould you like to go to see a movie with me tonight—Sorry, Mary_________ tomorrow’s lessons, I have no time to go out with you

dsare like leaves, __________everywhere, but true friends are like diamonds,precious and rare.