Câu hỏi:

The correct answer is B. released.
* Patented means obtaining a patent for an invention.

* Released means to make something available to the public.

* Boosted means to increase or improve something.

* Applied means to make a formal application or request.
In this context, 'released' is the most suitable word to describe making a CD available to the public.

The correct answer is C. community. The sentence requires a word that relates to development in a social context. "Community development" refers to activities aimed at improving the social well-being of a community.

The best answer is B. 'Grocery' makes the most sense in the context of going shopping. The phrase 'grocery shopping' is a common collocation.

A. company: This doesn't fit the context.
C. laundry: This doesn't fit the context.
D. factory: This doesn't fit the context.

The correct answer is A. interact, which means to communicate or work together. This fits the context of working with many people during volunteer work.

* Interact (tương tác) là đáp án đúng vì nó có nghĩa là giao tiếp hoặc làm việc cùng nhau. Điều này phù hợp với ngữ cảnh làm việc với nhiều người trong công việc tình nguyện.
* Balance (cân bằng) không phù hợp.
* Imitate (bắt chước) không phù hợp.
* Consume (tiêu thụ) không phù hợp.

The correct answer is B. 'so'. The sentence means: My headache was still painful, therefore I went to see a doctor.
Câu trả lời đúng là B. 'so'. Câu này có nghĩa là: Tôi vẫn còn đau đầu, vì vậy tôi đã đi khám bác sĩ.