Because Mr. Brown was ill, _____ he didn't come yesterday.
A: so
B: or
C: /
                    A: so
B: or
C: /
举一反三
- He didn't go to school________he was ill yesterday. A: because B: because of C: if D: as
 - He didn't go to school yesterday ______ he was ill. A: because B: if C: so D: that
 - He was ill. That is ____ he didn’t come yesterday.
 - It was because he was ill ______ he didn’t go to school.
 - Because ill, he didn’t attend the meeting.
 
