________ made the school proud was ________ more than 90% of the students had been admitted to key universities.

[　　]

The fact puzzled John Smith much ________ he has been unable to pass the driving test up to now.

[　　]

－Doesn't Mr. Smith live on this street?

－No. This is ________ Mr. Brown lives.

[　　]

They want to know ________ do to help us.

[　　]

The teacher didn't know ________ to blame for the broken glass as it happened while she was out.

[　　]

She asked me ________ to build this factory.

[　　]

A．how long it was taken

B．how much time did it take

C．how long it had taken

D．how much time it was taken

Scientists believe that the first inhabitants of the America arrived by crossing the land bridge that connected Siberia and ________ more than 10,000 years ago.

[　　]

Teachers do all they can to ________ their students ________ bad habits.

[　　]

The bell ________ the end of the period rang, ________ our heated discussion.

[　　]

A．indicating; interrupting

B．indicated; interrupting

C．indicating; interrupted

D．indicated; interrupted

The way we view learning and knowledge ________ rapidly, so tomorrow' s schools will be different from ________ they are today.

[　　]

A．has changed; what

B．will change; which

C．is changing; what

D．will have changed; how