题目：
You are supposed ________ the work yesterday but you forgot.
A．to finish
B．to be finishing
C．to have finished
D．had finished
答案：
答案：C
考查非谓语动词。be supposed to do应当做，根据语境昨天已经完成工作，故用不定式的完成时态，选C。
You are supposed ________ the work yesterday but you forgot.
A．to finish
B．to be finishing
C．to have finished
D．had finished
答案：C
考查非谓语动词。be supposed to do应当做，根据语境昨天已经完成工作，故用不定式的完成时态，选C。
