英语题求助单选our English teacher often asks me-English as - as I c

英语题求助
单选
our English teacher often asks me-English as - as I can
A.to speak many B.not to speak many C.to speak much D.not to speak much
look, the factory is pouring water into the river
that's terrible.why not -them - that?
A.keep doing B.stop doing C.to keep to do D.to stop to do
he should apologize - his father for his rudeness
A.for B. to C. with D.on