下列读音和字形都正确的一组是(   )。

根据句意及首字母提示，完成句子.
____ Now your plan is __________(clean ) the blackboard.
____ When someone knocked at the door, he _________(watch) TV.
____ I was busy preparing for my exam yesterday, so I couldn't help_________(do) some cleaning.
____ Is he used to _________ (get) up early?
____ Did you make a _________on the spring trip? (decide)

①朋友越多越好                                                ②要乐交诤友，不交损友

③真正的朋友建立在志同道合的基础上        ④要交对自己有用的朋友

下列对光合作用意义的描述，不正确的是(   )。