The substance’s very toxic. Protective clothing must be worn at all times.

Knowledge: Inversion

Explain:

Since S + V: because

So S + V: so

… too + adj + to V: …so… so much that I can’t do anything

…so + adj + that…: so… so… that…

=> Inversion: So + adj/ adv + be/ V + S that S + V: What’s so… that…

The substances are very toxic. Protective gear must be worn at all times.

= B. The substances are so toxic that protective gear must be worn at all times.

A. is wrong because you don’t use 2 conjunctions in the same sentence

C. is wrong in “such”

D. Substances are so toxic that protective gear cannot be worn at all times. => wrong in meaning

Select REMOVE