It is now generally believed that a good teacher should be ________ to his/her students.

She didn’t go to see the film Lost in Thailand (《泰囧》) with us because she _____ it already.

_______the thick clouds, you would find the kite in the sky easily.

19. They________a lot of suggestions for improving the workers’ living conditions.

The three bags all look beautiful. I don’t know which one to _______.