— Is it good to look up every new word when I come across it in reading?—No，you _____，because you are likely to guess the meaning from the context,

I__________through that bitter period without your generous help.     

Even a drop of water ______because it is so important to all the living things.

 Few weight-loss pills can help to keep people slim, _______?

—May I smoke here，please?—I am afraid you           ．This is a non-smoking area．