please look carefully before you_____(cross)the street.请运用适当的形式填空并说明道理.

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please look carefully before you_____(cross)the street.请运用适当的形式填空并说明道理.
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please look carefully before you_____(cross)the street.请运用适当的形式填空并说明道理.
please look carefully before you_____(cross)the street.请运用适当的形式填空并说明道理.

please look carefully before you_____(cross)the street.请运用适当的形式填空并说明道理.
cross
这里before是介词后面加从句,you_____(cross)the street.这一句子缺少了谓语,又考虑时态一般现在时比较恰当.故用cross.

cross 原型 一般现在时 本剧是起始句 没有别的时态，所以用原型

look .out,watch.out,take care,be carefull分别如何造句 Please look _your book look at the ( ),please 这道题如下图Please Look please look and please look here 翻译下这英文when you come near please listen carefull those shivering leaves are the passion of my Alice,please look this book. please look ----- the blackboard.介词 look,these,photos,at ,please Look at these ( )(watch),please. look at the blackboard,please. 改错:Please look the blackboard. PLEASE LOOK AFTER MOTHER怎么样 please look us up.翻译 Please look the words改错 PLEASE LOOK AFTER MOM怎么样 yes,Look-------- These ones,please.