单选题
1.[2009.01]I was writing a report last night；_______I would not have stayed up late.
A.however
B.otherwise
C.therefore
D.furthermore
正确答案：B
答案解析：本题考查副词词义辨析。句意：我昨天晚上写一个报告，否则我就不会熬夜了。A然而，不过；B否则，要不然；C因此，所以；D再者，而且。