Correct the Sentence - XV

Correct the following sentences

(1) Open the light.
(2) Shut the light.
(3) His hand has been operated.
(4) It is written in this letter.
(5) He was very kind enough to comply with my request.
(6) He did it anyhow.
(7) To tell in brief.
(8) He told the story in details.
(9) This book is much interesting.
(10) He behaved cowardly.

Answers :
(1) Turn on the light.
(2) Turn off the light
(3) His hand has been operated upon.
(4) This letter says that...
(5) He was kind enough to comply with my request.
(6) He managed to do it somehow.
(7) In short.
(8) He told the story in detail.
(9) This book is very interesting.
(10) He behaved in a cowardly manner.
Or
He behaved like a coward.