How many students went to the hockey game?（）

A.None of them go to the hockey game.

B.They seldom go to the hockey game. 

C.They usually went to the hockey game.

D.All of them went to the hockey game.

正常人的体细胞染色体数是46条，在下列细胞中，可能存在两个X染色体的是（）

①精原细胞

②卵原细胞

③初级精母细胞

④初级卵母细胞

⑤次级精母细胞

⑥次级卵母细胞

A.①③⑤

B.②④⑥

C.①③⑤⑥

D.②④⑤⑥