(2013·湖北，22)Carbon dioxide, which makes a________between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.

Science and technology have __________ in important ways to the improvement of agricutural production.

Don’t think you are _______ when you make a mistake _______, since no one is perfect.

 -- Why was the driver taken to the police station last night? -- Because he refused to ______ to a blood-alcohol test and attacked the police.

 Do your best to remember other people's names and interests, which shows you ________ them.