1.Be careeful when you

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1.Be careeful when you ____ the road.
A.across B.read C.watch D.crossing
答案：cross 越过,横过
2.They happy ___ each other.
A.see B.saw C.sees D.to see
答案：D形容词后面接动词不定式结构.
3.You may see ___ in the morning.
A.few traffic B.many traffic C.much traffic D.lot of traffic
答案：Ctraffic 是不可数名词,用much或者lots of修饰.
4.The young mother ___ worried.
A.look B.looks C.look like D.lookslike
答案：B主语是第三人称单数,单词用单数形式,look 表示“看起来”,后面接形容词作表语.
======以下答案可供参考======
供参考答案1:
D. crossing
D.to see
C. much traffic
B.looks