下列各句中，没有语病的一句是

sor White has written some short stories, but he is________known for his plays

－Youcan’t imagine _______ fantastic fun web chatting is －Really But it may cause a lot of trouble sometimes

I want to ask Mrs Anders if she wouldlike to join our dance. —______

John, could you please the black-board now It’s your duty today.— OK. I’ll do it right away.