边界层分离的必要条件是（)。

He insisted that all of them______present at the banquet.

A．are

B．were

C．be

D．are to

He insisted that all of us (be) ______ there on time by any means.

____________ he insisted that he had done right. (无论我怎么劝说他).

He insisted on doing ______ good to others.

A．what he thought it was

B．what he thought was

C．what he was thought

D．what it was he thought

A、with hearing

B、in hearing

C、on hearing

D、for hearing

He ________ finding a taxi for me, even though I told him I lived nearby.

A. insisted on

B. insisted at

C. insisted that

D. insisted in

He insisted that we all be in his office at one o’clock.()

His government insisted that he ______until he finished his degree.

A．would stay

B．stay

C．stayed

D．shall stay

A．be,should go

B．should be,would go

C．was, go

D．was, would go