We _________ try our best to fight against pollution.
句意：我们应该尽力与污染作斗争。
考查动词辨析。should应该；may也许；mustn’t禁止；needn’t不需要。根据“We…try our best tofight against pollution.”可知，我们应该尽力与污染作斗争。故选A。
We _________ try our best to fight against pollution.
—Sorry, Miss Chen. I missed the early bus, so I was late again.
—It doesn’t matter this time. You ________ leave home 10 minutes earlier than before in future.
We ________ eat or drink in the museum. It is against the rule.
I love the weekends,because I ________ get up early on Saturdays and Sundays.
To my joy, we_________go to the bank. Mary has lent us some money.
——Must I be back home before 6 o’clock?
——No, you ____. Butdon’t be too late.
—Must I get there on time? I'm too tired to walk on.
—I'm afraid you _______. You can't miss the good chance.
—How do you usually go to school?
—My school is far away.I ________ take the bus to school.
—You ________ takephotos here! Look at the sign. It says “No photos”.
—Sorry, I won’t.
My bike was broken yesterday，so I____walk home．
