It must be getting on for midnight.
一定快到半夜了。
It must be stressed that this disease is very rare.
必须着重指出，这种病非常罕见。
It must be worrying for you not to know where he is.
你不知道他的下落一定很着急。
It must have happened at about five o'clock in the morning.
这件事一定发生在凌晨五点钟左右。
It must be hard for her, bringing up four children on her own.
她一个人抚养四个孩子一定很艰难。
'It must be here somewhere,' she said, rooting through the suitcase.
“它一定就在这里的什么地方。”她一边说一边翻着衣箱。
It must be ascertained if the land is still owned by the government.
必须确定这块土地是否仍属于政府所有。
In order that training should be effective it must be planned systematically.
为使培训有成效，必须有系统的计划。
它必须及时前进。
It must come true sometime soon.
它一定会在将来不久变成现实。
It must have been having a meal.
它一定是在吃饭。
"It must be very early," she said.
“一定很早。”她说。
It must have come a bit expensive.
一定是贵了点。
它一定就在我们周围。
It must have flown into the window.
它一定是飞到窗户上了。
这必须被指出来。
它一定是艾伦的。
现在一定正在下雨。
It must belong to Alan's little brother.
它一定是艾伦的弟弟的。
一定是那个盒子！
今天一定是阴天。
一定是锁了。
我们必须拯救它。
这准花了相当大的一笔钱。
那辆汽车肯定很了不得。
It must have been one hell of a party.
那肯定是一次很棒的聚会。
I cannot conceive what it must be like.
我想象不出它会是什么样子。
It must be all of 100 metres to the car!
走到车那里一定足足有100米呀！
He thought that it must be worth billions.
他认为它一定值亿万元。
It must be knocking around here somewhere.
它肯定在这儿某个地方。
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