填单词1.I'll call her right a( ).2.I'm s( ) to hear that.注：括号前的

填单词
1.I'll call her right a( ).
2.I'm s( ) to hear that.
注：括号前的"a"和"s"都为要填单词的首字母．填好后说明理由哦!
选择
Look!The boys are ( ) under the tree.
A.sing B.singing C.running D.flying
注：也要说明理由哦!