It’s getting dark. You’d better ________ out by yourself. It’s dangerous.
句意：天黑了。你最好不要一个人出去。这很危险。
考查情态动词。had better (not) do sth.为固定句型，意为“最好(不要)做某事”；根据“It’s dangerous.”可知，这里指最好不要出去，故选B。
It’s getting dark. You’d better ________ out by yourself. It’s dangerous.
Time is limited! You'd better________your time any more.
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.
