Question

the students won't waste time the question tag to be used A)Did they? B) don't they. C) will they? D) do they​

Answer 1

c) will they ............

Answer 2

The students won't waste their time. The question tag for the this sentence is Will they?

Explanation:

The students won't waste their time. The question tag for the this sentence is Will they?

The students won't waste their time, will they?

• Question tags are in interrogative fragments instead of a complete question.
• These are confirmatory words added at the end of a statement which makes the statement sound like a question.
• There are certain rule for forming question tags :

1. If the main clause is positive then question tag should be negative.
2. If the main clause is negative then the question tag should be positive.
3. Question tags contain only  two words. It is based on the subject or verb in the main clause.

Here as the main clause "The students won't waste their time" is negative the question tag used should be positive Will they.

Won't being the subject, its positive form is will, hence will they?