1 . Snow怀疑水泵就是罪魁祸首。（汉译英）

2 . 选词填空

severe, break out, blame, suspect, cast a shadow, thanks to, once and for all

As we all know, cholera is a     1     disease which once     2     over people all over the world every time it     3    . At first, people     4     it was due to bad air.     5     John Snow, the truth was found out that the polluted water was     6    . Since the cause was known, cholera was defeated     7    .

3 . 从他不正常的行为来评判，我怀疑他是个小偷。
Judging from his abnormal behaviour, I ________ a thief.

4 . In Samarkand, Mr Bissell admires the architectural wonders, while on his way to Bukhara he gets a taste of police methods when ________ (suspect) of drug dealing. (所给词的适当形式填空)