What are you busy with,Simon?简单的单项选,要告诉我为什什么选这个

What are you busy with,Simon?简单的单项选,要告诉我为什什么选这个
-What are you busy with,Simon?
-I am busy packing _____ miss the flight
A.not to B.in order that C.in order to D.so as to
Lucy ,you are so early today!
____ the first bus,I have to get up early
A.Catching B.To catch C.Caught D.Catch
-how is your boss?
He is not very difficult_______.
A.to work B.working Cwouldn't Dcouldn't
He ate little this morning,_______he
________he ate a lot.
Adid,Yes Bdidn't,Yes Cdoes,No Ddidn't,No
You'd better hand in the paper before nine o'clock,_you?
Ahadn't B.didn't Cwouldn't Dcouldn't