As is often pointed out, knowledge is a two-edged weapon which can be used ______ for good or evil.
________ some more chairs,tables and so on, the room looked more beautiful.
________ to the hot weather here was more difficult than I had expected.
________ that's important is that you are doing your best and moving in the right direction.
—It often rains in that area.Please take an umbrella with you.—________.
—How is the man injured in the earthquake?—The doctor said if ________ in a proper way,he was likely to be saved.