1 . If Nina __________ that her husband would go to the bus stop to meet her, she wouldn’t have walked back home.

A．knows

B．knew

C．has known

D．had known

2 . —I’m your old friend Tom. We used to study in the same high school. —Tom? I’m sorry I _______ you. Where have you been all these years?

A．haven’t recognized

B．hadn’t known

C．don’t know

D．didn’t recognize

3 . At the police station, she ______ her handbag as soon as she saw it.

A．realized

B．knew

C．recognized

D．brought

4 .         about the universe up till now.

A．So little had me known	B．Only a little do we know
C．Very little have we known	D．Little shall we know

5 . Reading books is a good way ________ the world.

A．know

B．knows

C．to know

D．knowing

6 . ________ much about computer technology troubled him a lot.

A．He didn’t know	B．Not his knowing
C．He not knowing	D．His not knowing

7 . Mrs Brown was not surprised at the exciting news at all; she ________ about it.

A．must have known	B．must know
C．should have known	D．should know

8 . “I didn’ t know my daughter was to lead the dance until I saw her on the live broadcast,” said Ye Hongjie. She added that before the ceremony what she________ was only that she was going to attend the ceremony.

A．knew	B．has known
C．had known	D．knowing

9 . Though she changed a lot in appearance, I ________ her the moment I saw her.

A．recognized

B．admitted

C．understood

D．knew

10 . ________ that he wouldn’t be able to buy food on his journey, he took large supplies with him.

A．Knowing

B．To know

C．To be knowing

D．Known