(A) are usually able to be modified to make them a more effective drug.
(B) are usually able to be modified to make them more effective drugs
(C) are usually able to be modified, which makes them more effective drugs
(D) can usually be modified to make them a more effective drug
(E) can usually be modified to make them more effective drugs
Solution:
Idioms + Pronoun
“are usually able to be” is passive and sounds awkward and therefore “can usually be” should be preferred. Hence, A, B, and C are incorrect. Moreover, in A, “drug” should be in plural form because antibiotics is plural- “antibiotics…to make them a more effective drug(s)”
In D, “them” refers to “antibiotics” which is plural. Therefore, “drug” should also be plural in form. “antibiotics can….to make them a more effective drug”. Hence, D is incorrect.
In E, “drugs” is correctly used in the plural form and hence, E is the best choice.
Sentence Correction - 1000 Questions with Solution:
