After seeing the movie Three Idiots, I felt shocked and annoyed, not knowing ________．

A．who to be blamed

B．who to blame

C．who blamed

D．who should blame

________ about 6300 kilometers, the Yangtze River is the third longest river in the world, running through 9 provinces of China．

A．Measured

B．Being measured

C．Measuring

D．To measure

Unfortunately, women were not admitted to university in the past, ________, nowadays, they have got equal rights．

A．while

B．when

C．as

D．since

________ with the efforts that the students made, all the teachers nodded and smiled．

A．Satisfying

B．Having satisfied

C．Satisfied

D．To be satisfied

Not until the teenager left his hometown ________ how much he loved it．

A．did he know

B．he knew

C．had he known

D．he had known

The exhibition hall is clean and tidy, with a range of goods already ________ for sale．

A．laid

B．lain

C．laying

D．to lay

Don't cut across other people's campsites, ________ will bring much inconvenience to them．

A．where

B．which

C．what

D．that

Everyone queued up before the booking office in silence, having nothing to do but ________．

A．to wait

B．waiting

C．wait

D．waited

It was when I argued with Hannah ________ I told her we were not going to be friends any more．

A．until

B．that

C．so

D．when

Great changes ________ in the city, and a lot of factories ________．

A．have been taken place, have been set up

B．were taken place, were set up

C．have taken place, have been set up

D．have taken place, have set up