Perplexing sentences

1. The men were not used to hearing that there were problems ………. the spaceship and they thought that this was strange.

a) with b) of c) in d) at

2. "Don't shut the window" gives the same meaning as ...............

a) 'Let the window not be shut"

b) " Don't let the window be shut"

c) Both A & B are OK.

My answer

1. a 2. c Am I right?