Question

—Who ________ it be that hasn't handed in his composition?

—It ________ be Robinson.He ________ it in yesterday.

A．can; will; should hand

B．can; must; should have handed

C．may; may; can't have handed

D．will; can; could have handed

 

Answer 1

B

can表主观猜测，常用于疑问句和否定句；must表推测，用于肯定句；should have done表示本应该做某事而实际未做。根据题意知B项正确。