ESL G7 Relative clauses beginning with prepositions

The eco-house ___ recycled glass is used blends naturally with the forest.

• in which
• on which
• from which
• at which

Answer explanation

In is used for something happening inside a place; which refers to a thing.

The engineers ___ we collaborated created a rainwater filtration roof.

• with whom
• for whom
• by whom
• at whom

Answer explanation

With is used after the verb collaborate; whom refers to people.

The stadium ___ recycled steel was used has a lower carbon footprint.

• for which
• in which
• about which
• from which

Answer explanation

For is used to show purpose or reason; which refers to a thing.

The landscape artist ___ the project was assigned planted native trees.

• to whom
• with whom
• for whom
• by whom

Answer explanation

Assign to someone → uses to; whom for a person.

The cultural center ___ native plants grow promotes biodiversity.

• around which
• in which
• from which
• with which

Answer explanation

Plants grow around it, not inside it.

The local builders ___ we sourced materials used sustainable methods.

• from whom
• with whom
• to whom
• by whom

Answer explanation

We say source materials from someone.

The tower ___ wind turbines are installed generates renewable energy.

• on which
• at which
• to which
• of which

Answer explanation

Turbines are installed on structures.

The professor ___ the students learned sustainable design now teaches at MIT.

• from whom
• with whom
• to whom
• by whom

Answer explanation

Students learn from a person.

The community hall ___ solar panels are connected runs on clean energy.

• to which
• on which
• in which
• about which

Answer explanation

Panels are connected to something.

The scientist ___ we worked advised us on energy use.

• with whom
• from whom
• by whom
• to whom

Answer explanation

We work with someone.