下列哪一个不是浸润性脾肿大的病因（）

A.遗传性球形细胞增多症

B.恶性淋巴瘤

C.真性红细胞增多症

D.原发性血小板增多症

E.慢性粒细胞白血病

In order to improve English, ________________.

A．Jenny’s father bought her a lot of tapes

B．Jenny bought a lot of tapes for herself

C．a lot of tapes were bought by Jenny

D．a lot of tapes were bought by Jenny’s father