Question

Complete the following sentence with an appropriate modal verb:
The weather is nice now but it _______ change later.
(It's a possibility, but you are uncertain)
A) can
B) will
C) could
D) must

Answer 1

 Hint: Modal is an auxiliary verb that is used to express modality (a classification of propositions on the basis of whether they claim necessity or possibility or impossibility).
For example- can, will, should.

Complete answer :
Let us analyze the options given to us in this question:
Option (a.), 'can', refers to a modal that expresses ability which is certain.
For example- She can easily ace this test.
Option (b.), ‘will', refers to a modal that expresses certainty in an act being performed in the future.
For example- She will perform in the stadium tonight.
Option (c.), ‘could', refers to a modal that expresses an uncertain possibility.
For example- She could have sabotaged him.
Option (d.), ‘must', refers to a modal that expresses extreme obligation.
For example- He must listen to the instructions before the test starts.

Hence Option ‘C’ is the correct answer.

Note: In this question, do not be confused between ‘can’ and ‘could’. Could is a modal that refers to something that may happen, whereas can is a modal that refers to something that can be made to happen.