Question

In the sentence given below, one word has been omitted. Pick the option that has the missing word along with the words that come before and after it.

During the Industrial Revolution, the disposal of waste become more complicated as factories produced new types of wastes.

• A. Waste had become
• B. Waste has become
• C. Waste had been
• D. Waste would have

Answer 1

The correct option is A Waste had become

'Industrial revolution' was an event of the past. So, when the sentence talks about two events both of which have occurred in the past, we use past perfect or past perfect continuous tense. In this sentence, since we are talking about only one activity i.e waste disposal, we will use a past perfect tense word.

From the given options, option B) waste has become is incorrect as has indicates the present tense. Option C) waste had been is incorrect because it is grammatically incorrect to use 'had been' before 'become'. Option D) waste would have become is incorrect because it indicates a possibility whereas the sentence is telling us that waste disposal was an actual problem. So, the most appropriate answer is A) waste had become.