Parents usually care much about how their children ________ at school.

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As an airhostess, you should learn how to serve ________ passengers.

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________ the past, I ________my parents.

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A．Looking back at, thank a lot to

B．Looking back on, owe a lot to

C．Dating back from, feel grateful to

D．Thinking of, appreciate

CM April Fools' day, little children like to ________ others.

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I can't imagine Jack ________ for ________ people .

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________ he entered the room, he ________ something strange.

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A．Every time, noticed

B．Immediately, watched

C．No sooner, found

D．The moment, sensed

You ________ your son instead of scolding him, ________ he is a child.

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A．should have reasoned with, after all

B．must have argued with, above all

C．could persuade, first of all

D．need comfort, at all

This rare stamp is ________ an unknown collector.

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People are usually busy buying things ________ before the Spring Festival.

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The painting is ________ and you can never pay enough for it.

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