1. CS
2. S
3. S
4. CS
5. S
6.
(1) I like coffee, and Mary likes tea.
(2) Mary went to work, but John went to the party, and I went home.
(3) Our car broke down; we came last.
(4) While playing football, the ball thrown by my friend hit the boy crossing the street.
(5) Elissa was very sick today and we will take her to the hospital now, before she gets worse.