Question

if he had worked harder(. ) passed the exams 1wouldhave 2would 3have 4will​

Answer 1

Explanation:

Diffusion is the movement of a substance from an area of high concentration to an area of low concentration. Diffusion happens in liquids and gases because their particles move randomly from place to place. Diffusion is an important process for living things; it is how substances move in and out of cells.

Answer 2

Answer:

Form In a Type 3 conditional sentence, the tense in the 'if' clause is the past perfect, and the tense in the main clause ... You would have passed your exam if you had worked harder.

Missing: 1wouldhave ‎2would ‎3have ‎4will