You should know _______to spend all your money on those impractical fancy goods.

It is commonly assumed that the growth of GDP and the development of people’s living conditions are not _______cause and effect.

—I thought he hated TV.—You are right, ______. he still watches the program.

Our country will try to make greater progress in improving people's living conditions，________low­income families.

. ---You don’t seem to be quite yourself today. What’s wrong? --- Oh, I'm suffering from a cold. Nothing serious, ____.