1 Yes
2 a (c is also possible in certain contexts- I want you moving (= working, etc) by 10am.
3 Yes, the second is just a colloquial ellipsis for the first
4 took
5 Present perfect if we don't know whether the exam was morning or afternoon, but if we think the answer's going to be 'yes', then the past makes more sense to me
6 Yes- it would make it past
7 No- it isn't working is only about now- it could work fine most days
8 This refers to something in the area around the speaker
9 Not much
10 b suggests that they have been moving for a long time, while a could be used at the start of the move
11 Both could be used- the first suggests a real possibility and the second an imaginary one
