21．My doctor kept telling me about my weight,I never bothered.
A．so B．and C．or D．but
22．Sue will invite all her classmates to her housecoffee.
A．for B．with C．of D．by
23．She explained to mepersonal computers let everyone explore their own ideas.
A．that B．how C．what D．where
24．---I haven’t got anything planned. Are you doing anything?
---No, I haven’t got anything planned,.
A．too B．yet C．either D．neither