几道英语选择题 急用!1.（ ）There are so many birds in the aviary. Let's

几道英语选择题 急用!
1.（ ）There are so many birds in the aviary. Let's______in quietly.
A.walking B.to walk C.walk D.walks
2.( ) Look, the duck is ______something to eat.
A.look for B.look at C.looking after D.looking for
3.( ) Let's go to ______a picture show at Shanghai Museum, shall we?
A.see B.meet C.read D.look
希望英语高手能帮小弟一下!
我一定重谢!我急用