Directions: Each of the following sentence has a mistake in grammar usage or idiom. Each sentence is broken up into four parts sequentially 1, 2, 3 and 4. Choose the part that has an error and mark accordingly.
(a) (1) It is stupid to go
(2) to the expense of taking
(3) music lessons
(4) if you never practice
(b) (1) You will find
(2) if difficult
(3) to explain of your use
(4) of such offensive language
(c) (1) Because of the
(2) extenuating circumstances
(3) the court acquitted him
(4) out of the crime
