He was lost in the busy streets. But at last it was _______ of him to find the way home.
当别人向你介绍一位新同学时,你应该对新同学说:_________
Linda is thirteen ________ old. She is my friend.
– ______ is your friend ? – Maria.
This is ______ banana and that is _______ orange.
无论处于何处都须大写的字母是_________.