What ___________ the main reason for the decline in local businesses in small towns?

Answer explanation

In this question, we use "must have been" to express strong certainty about a past event. The decline in local businesses is something that is almost certain to have happened based on the context provided.

Globalization ____________ allow people to easily communicate across borders.

Answer explanation

Here, "may allow" is used to express a possibility or potential outcome of globalization. Globalization creates opportunities for communication across borders, but it's not a guarantee in every instance.

They ___________ missed the flight because they arrived at the airport late.

Answer explanation

"Might have" is used to indicate a possibility in the past. It suggests that there is a chance they missed the flight due to arriving late, but it's not certain.

The company _____________ expanded its market share due to globalization.

Answer explanation

"Could have" is used to talk about a possibility or ability in the past. It suggests that the company had the potential to expand its market share because of globalization.

He ___________ studied abroad to learn about different cultures.

Answer explanation

"Must have" expresses strong certainty about a past action. It indicates that he almost certainly studied abroad to learn about different cultures.

Globalization _____________ provide access to goods from around the world.

Answer explanation

"Can provide" is used to express the ability or possibility in the present. Globalization enables access to goods from around the world; it has the capability to do so.

They ____________ experienced culture shock when they moved to a new country.

Answer explanation

"Might have" is used to suggest a possibility in the past. It indicates that there is a chance they experienced culture shock when they moved to a new country.

People ____________ been more isolated before globalization connected them through the internet.

Answer explanation

"Must have" expresses strong certainty about a past state or condition. It suggests that people were almost certainly more isolated before globalization connected them through the internet.

The internet _____________ opened up new opportunities for businesses to reach global markets.

Answer explanation

"May have" is used to express a possibility in the past. It suggests that the internet possibly opened up new opportunities for businesses to reach global markets.

He _____________ be at the conference. I saw him in the registration list.

Answer explanation

"Must" is used to express strong certainty in the present. Based on seeing his name in the registration list, it's almost certain that he is at the conference.