—Peter, how old is your father this year?
—_______. And we just had a party for his _______ birthday last weekend.
A:Fortieth; forty
B:Forty; forty
C:Forty; fortieth
D:Fortieth; fortieth
根据实验过程中的现象判断:
_________ he was exercising in the park yesterday morning, he found a purse under the tree.