correct answer

[michelle.siel]

Hi,

I would like to know which of the following answers is correct and why.
I don’t know what she _______ about my staying silent but she certainly could not guess what I _______ about at the time.
a) was thinking; thought;
b) thought; thought;
c) thought; had thought;
d) thought; was thinking.

Thank you in advance.

[Soup]

I don't know what she _______ ... but she certainly could not guess what I _______ about at the time.

a) was thinking; thought [about]
b) thought; thought [about]
c) thought; had thought [about]
d) thought; was thinking [about at the time]