____ his arrival___the airport,he saw a dog.A.On,at B.At,of

____ his arrival___the airport,he saw a dog.A.On,at B.At,of He began to work there （ ）.A.on his fifty B.at the age of fi He gets lots of presents ( ) his birthday.A.on B.in C.at He began to work there____.A.on his fifty B.at the age of fi he began to work THERE( ) A.on his fifty B.at age of fifty C 1.（ ）He had ____yesterday .He saw a snake at his foot at his Mr.Green is rich.He ___ his dog ____ meat.A.feed,on B.feeds, She had to take care of the dog at home,____?a.hasn't she b. He is going to stay at home ____ two days.A.at B.on C.about 英语选择题：Tom saw an ad___a newspaper. A.on B.in C.at D.of原因? Tam was （ ）the queue when I saw him A.at the head of B.at he his arrival at the airport,he made a long distant call to hi