_____ prevent her from going to the party, he pretended to be ill ______.

A．So as to, by design

B．In order to, on purpose

C．So as to, by accident

D．In order to, with purpose

对苗木采取切根措施，是为了（）。

A、抵制苗木根系生长

B、促进苗木侧根须根生长

C、促进苗木木质化

D、促进苗木茎叶生长