---Why didn’t you tell me the truth about his illness?
---___________, I knew nothing about it at that time.

— The education system rather than the teachers      to answer for the heavy burden on the students.
— I agree. I hope the reform being carried out in our country at present will bring about the
       results.

Most of the representatives raised a question at yesterday’s meeting,       needs      urgently.

They were very excited to see the baby tiger ______ by the mother dog.

The mother forbids     noise in our study，but she doesn’t forbid us____ a discussion．

Seeing the picture ,she could resist _____. 

_____at what he said,she asked him why he said so to her.

Every minute should be _________ lessons.

The key _________ the string was put into the door to stop the kite _________.

_________ that he had fallen behind,he tried to work harder.