根据括号内所给单词的适当形式填空。

小题1:            (lucky), I finished my work on time.

小题2:Are there any _______ _  (sheep) on your uncle’s farm?

小题3:I can hear the children               (sing) in the classroom.

小题4:We went             (camp) in a small village in India.

小题5:– What did you do last Sunday ?

– I ________ (study) English at home.  

膀胱发生的尿路上皮内翻性 * * 状瘤正确的是（）

A.比较常见

B.常与腺性膀胱炎合并存在，并可发展为尿路上皮 * * 状癌

C.组织学上与低级别尿路上皮 * * 状癌容易鉴别

D.肿瘤细胞可有异型，常侵犯肌肉

E.属于恶性肿瘤，手术切除后常需放疗和化疗