In no case（）give up the experiment. A. would he B. will he C. he will D. he would

In no case（）give up the experiment. A. would he B. will he C. he will D. he would

The correct answer is B. will he.

Let’s break it down:

1. Structure of the sentence
The phrase “In no case” at the beginning of the sentence signals a negative or restrictive opening.
When a negative or restrictive phrase starts a sentence for emphasis, the sentence usually requires inversion (subject and auxiliary verb are switched).

2. Inversion rule
Correct form:

In no case will he give up the experiment.
Not:
In no case he will give up the experiment.

3. Tense
The sentence is a general strong statement about the future or his determination, so “will” fits better than “would” unless it’s clearly hypothetical or past context.

4. Looking at the options

A. would he → possible in a hypothetical context, but here simple future is more natural.

B. will he → correct inversion, correct tense.

C. he will → no inversion, wrong after “In no case”.

D. he would → no inversion, also wrong.

Thus the best choice is B. will he.

✅ Correct sentence:

In no case will he give up the experiment.