Concord, Modal Auxiliary, Conditionals

You ____ finish your homework before you go out.

Answer explanation

must

She ____ speak three languages fluently.

Answer explanation

The correct choice is 'can'. The sentence should read: 'She can speak three languages fluently.' 'Can' is used to indicate ability in this context.

We ____ leave early to avoid traffic.

Answer explanation

The correct choice is 'should'. We should leave early to avoid traffic.

You ____ have seen that movie; it's really good.

Answer explanation

must

I ____ go to the store to buy some groceries.

Answer explanation

The correct choice is 'need to' as it indicates a necessity or obligation to go to the store to buy groceries.

They ____ be home by now; it's getting late.

Answer explanation

The correct choice is 'must'. The sentence implies a high probability that they should be home by now, indicating a necessity or obligation, making 'must' the appropriate word choice.

You ____ take an umbrella; it looks like it might rain.

Answer explanation

should

We ____ go to the beach tomorrow if the weather is good.

Answer explanation

The correct choice is 'will'. The modal verb 'will' is used to express future certainty or intention. Therefore, the sentence should be 'We will go to the beach tomorrow if the weather is good.'

He ____ be at the office; I saw his car outside.

Answer explanation

must

You ____ drive carefully in the rain.

Answer explanation

You must drive carefully in the rain to ensure safety and avoid accidents.