第一题：You must be careful before you( ) A.across B.crossing C.

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第一题：You must be careful before you( ) A.across B.crossing C.cross D.walk cross
第二题：---Do you know ( )
---It is about 10 minutes' walk from here
A.how far is the post office
B.when does the post office
C.how far the post office is
D.when the post office opens
第三题：Which do you like ( ),purple or green?
I like green( )
A.best best
B.better better
C.best better
D.better best
适当形式填空
第四题：He came to the classroom ,------------（sing）a song.
第五题：He -----（fix）the broken bike when I came in
第六题：After you ------（pass）the seventh tree ,you will see my door
请讲解,50

1 C ( A 是介词,不能作谓语； B 现在分词不能单独作谓语； D WALK 后不能直接接动词）
2 C 宾语从句是陈述语序,排除 A B ,问距离用HOW FAR ）
3 B 两者相比用比较级
4 singing 现在分词作状语
5 was fixing (when 引导的状语从句：当一个动作发生时另一个动词正在进行）
6 pass 主将从现

第一题：You must be careful before you( ) A.across B.crossing C. when crossing street,you must be careful Be careful _____ the street.A.crossing B.cross C.across D.to You must be careful when crossing the street.改为祈使句 You must be _(careful) than before. You must be ______next time A.careful B.more careful C.caref ___you go across the road,you must be careful you must be careful you should be careful when you( )the street；A.across；B.go ac 英语高手请进1.You must be_____next time.A.careful B.more careful C You'd better_____next time.A.careful B.be careful C.are care Be careful when you are crossing the street.