Our foreign teacher asked us to tell some variety of English language that are the most common in the world.

• Correction: Our foreign teacher asked us to tell about some varieties of the English language that are the most common in the world.
• Answer: B

The vocabulary of English is very open because it has lent many words from other languages.

• Correction: No correction needed.
• Answer: D

My 10-year-old niece is bilingual, and she can speak Vietnamese and Russian equally competent.

• Correction: My 10-year-old niece is bilingual, and she can speak Vietnamese and Russian equally competently.
• Answer: C

If I went to Thailand, I would tried to pick up a bit of Thai because I like Thai language.

• Correction: If I went to Thailand, I would try to pick up a bit of Thai because I like the Thai language.
• Answer: B

Our smart fridge has sensors and cameras who can track when foods are expired.

• Correction: Our smart fridge has sensors and cameras that can track when food is expired.
• Answer: C

My dad is talking to the man whom provided solar panels for our village.

• Correction: My dad is talking to the man who provided solar panels for our village.
• Answer: B

That’s the woman who son owns a big furniture store in my town.

• Correction: That’s the woman whose son owns a big furniture store in my town.
• Answer: B

The man who was looking at the smart cooking appliances he is Lucy’s dad.

• Correction: The man who was looking at the smart cooking appliances is Lucy’s dad.
• Answer: C

Jo is using a voice assistant that he installed it this morning to control appliances in his house.

• Correction: Jo is using a voice assistant that he installed this morning to control appliances in his house.
• Answer: D