Directions: In the following questions, some part of the sentence is underlined. Which of the options given below the sentence should replace the part underlined to make the sentence grammatically correct? If the sentence is correct as it is given then choose option E ‘No Correction required’ as the answer.
1
In quick time she got acquainted with the new environment.
 
» Explain it
D
The phrase 'In quick time' must be replaced with 'In no time' which means very quickly and is more appropirate under the context. 

Hence, the option D is correct.

 
2
It was quite clear that the athlete can be able to improve upon his own record.
» Explain it
C
The underlined part 'can be able to' must be replaced with 'would be able to' to match the tense in the sentence.
 
Other similar examples:
Ex. He came at 8: 30 pm, freshened up and sat (not sit) by the window with his favourite novel.
Ex. It was obvious that he smoked (not smoke) in nobody's presence.
Ex. He said he would (not will) go to Lucknow on Friday.

Hence, the option C is correct.
 
3
He is a very lazy person and hate doing any kind of work.
» Explain it
D
The underlined part must be replaced with 'hates doing' as the verb 'hate' has to be in agreement with the the subject 'He' which is singular in number. 

Hence, the option D is correct.

 
4
 She opened the door as she know the person very well and had spent quite a few mornings with him.
» Explain it
C
In this sentence, the underlined part must be replaced with 'as she knew' as the clause has to be in agreement with the tense which is simple past.

Hence, the option C is correct.

 
5
Usha could not thinking of traveling without her car and feared the crowd.
» Explain it
A
As In simple modal sentences, modal verbs are followed by the base form of a verb. The underlined part hence must be replaced with 'could not think' to make it a grammatically correct sentence. 

Hence, the option A is correct.