More and more people have come to realize that if we had taken effective measures much earlier, the air quality ______ so seriously now.
— Is there anything wrong. Bob? You look sad.—Oh, nothing much. In fact, I ______ of my friends back home.
Choosing the right dictionary depends on ______ you want to use it for.
We all know that, _______, the situation will get worse.
--Can you read the sign, sir? No smoking allowed in the lift!--_______.
The ________film directed by Zhang Yimou made the audience deeply________.