1 . When       if he had any idea what the novel was about, Jack kept silent.
He      have read it very carefully.

A．asking; needn't	B．asking; shouldn't
C．asked; can’t	D．asked; mustn’t

2 . My sister met him at Ningbo Grand Theatre yesterday afternoon, so he         your lecture.

A．couldn’t attend	B．mustn’t have attended
C．shouldn’t attend	D．couldn’t have attended