求助六道外语题望得到解释

求助六道外语题望得到解释
6 He has formed the habit of sleeping with the windows left ________.
a open b opened c opening d to open
key a
7The home improvements have taken what little there is _______my spare time .
a from b in c of d at
key c
8 ----Do you mind if Edward rides in your car?
-----Yes,I do .I’ll be glad to take ________but Edward.
Key b
9 ---Did you criticize her for her careless?
---Yes,but I __it.
a would rather not do b would rather not have done
c shouldn’t do d had better not do
key b
10 We all write ________,even when there`s not much to say.
a now and then b by and by c step by step d more or less
key a
11We didn`t plan our art exhibition like that but it ______very well.
a went on b tried out c worked out d carried on
key c
11 It is the ________of foreigners to change gifts at Christmas.
A habit b rule c custom d hobby