Mike was ill yesterday he didn t go to school.A. ifB. butC. soD. or

问题补充：

Mike was ill yesterday, he didn t go to school.

A. if

B. but

C. so

D. or

答案：

A. if

B. but

(答案→)C. so

D. or

解析：if是否，如果；but但是；so因此；or或者，否则。麦克昨天生病了，因此他没有去学校。故选C。