Question

52) He got too tired
over work
A) because of
B) because off
C) on
D) for
53)
his principles, he has to be very careful.
A) with regard of
B) with regard on
C) with regard to
D) None of these​

Answer 1

Answer:

52) because of

53) with regard to

Explanation:

he got too tired because of over work

with regard to his principles, he has to be very careful.

Answer 2

He got too tired because of over work.

With regard to his principles, he has to be very careful.

Explanation:

• If a sentence like this arises, we need to check which options we can use and compare with the sentence until we get a clear answer.
• Trying the options we get,

1. He got too tired because of over work.
2. He got too tired because off over work.
3. He got too tired on over work.
4. He got too tired for over work.

• for next one,

1. With regard of his principles, he has to be very careful.
2. With regard on his principles, he has to be very careful.
3. With regard to his principles, he has to be very careful.

• As we can see except "because of" and "With regard to", others are not suitable.
• Therefore "because of" and  "With regard to" is the right answer.