I would say:

4. At least he knew you have a phone.

Possible context: as comment or reply after "He said he should

have called me instead of waiting until he saw me, but . . . "

8. 'thick' is pronounced like 'sick'

That is, if by "like" you mean "rhymes with, but has a different

initial consonant". If you mean EXACTLY like, I would call this

a plausible utterance. I have heard similar things in foreign-

accented speech from those whose first language doesn't

use initial unvoiced "th". (Where is IPA when I need it?)

Native speakers of German and related languages come to mind.