— Can you come and play football with me?

—______. I have a lot of homework to do.

A．Excuse me

B．I’d like to

C．I’m afraid not

D．It’s a pleasure

日本血吸虫（）。

A.尾蚴经皮肤侵入，成虫不寄生于人体

B.囊蚴经口食入，成虫寄生于小肠

C.囊蚴经口食入，童虫随血行移行

D.囊蚴经口食入，童虫经腹腔至胸腔移行

E.尾蚴经皮肤侵入，成虫寄生于门脉系统