答案是：
1.our watches are old
2.whose trousers are these
3.there are not any apples in the bag
4.Is the woman in blue Miss Gao
my watch is old.改为复数形式
答案是：
1.our watches are old
2.whose trousers are these
3.there are not any apples in the bag
4.Is the woman in blue Miss Gao