—Have you known Dr. Jackson for a long time?—Yes,since she ________ the Chinese Society.
Mum, I was wondering if you could lend me a few dollars until I________ on Friday.
------You’ve left the light on. ------Oh, so I have. _____________to turn it off.
I used to feel very nervous when I stood up in front of others, but now I feel quite ______when giving a speech to the school.
Although modem organic food has become very popular, many people can' t figure out the difference between organic foods and ______ grown foods.
David’s a terrible dancer; he's too _____ and keeps stepping on his partner’s feet.