28.1
1) catch
2) leave
3) let
4) catch
5) leave
6) leave
7) catch
8) let's
28.2
1) alone
2) catch
3) help
4) see
5) left
6) message
7) catch
8) cold
28.3
1) b, e
2) a, f
3) c, d
28.4
2) let me help you
3) let me give you a lift
4) I'll let you know tomorrow
28.5
1) I would let my best friend borrow my bike or car for the weekend.
2) I would let my best friend live in my home while I'm away.
3) I wouldn't let my best friend choose clothes for me in a shop.
4) I wouldn't let my best friend decide where we're both going for a holiday.
Удачи в учёбе!