VII.  Rewrite the following questions in reported speech, using question words before to-infinitives. 1.   “What should we do to help her overcome stress?”       They didn’t know____________________________________________________________ 2.   “Should I discuss this matter with my teammates?”       Jonas wondered_____________________________________________________________ 3.   “Where should I register for a course on life skills?”       An asked Mary______________________________________________________________ 4.   “How should we find a support center for the homeless?”       James and Lily couldn’t tell____________________________________________________ 5.   “When should we start our campaign?”       They had no idea ____________________________________________________________ 6.   “Mom, who should I call upon arriving at the airport?”       Trang asked her mother _______________________________________________________ 7.   “Should I dial 18001567 to ask for advice about family problems?"       Phong was not sure___________________________________________________________ 8.   “What should we do to help those disadvantaged children?”       They wondered______________________________________________________________ 9.   “When should I start teaching my children to cook?”       She couldn’t decide___________________________________________________________ 10. “How should I deal with negative emotions and stress?”       Hoa asked Nam _____________________________________________________________

Để viết lại câu hỏi trên trong reported speech, ta cần sử dụng các từ hỏi trước to-infinitive như "what", "where", "how", "who", "when" hoặc "should".

1. They didn’t know what to do to help her overcome stress.
2. Jonas wondered if he should discuss that matter with his teammates.
3. An asked Mary where she should register for a course on life skills.
4. James and Lily couldn't tell how to find a support center for the homeless.
5. They had no idea when to start their campaign.
6. Trang asked her mother who she should call upon arriving at the airport.
7. Phong was not sure if he should dial 1*** to ask for advice about family problems.
8. They wondered what to do to help those disadvantaged children.
9. She couldn’t decide when to start teaching her children to cook.
10. Hoa asked Nam how to deal with negative emotions and stress.

An asked Mary where she should register for a course on life skills.

Jonas wondered whether he should discuss this matter with his teammates.

They didn’t know what to do to help her overcome stress.

Để giải câu hỏi trên, ta cần phân tích sơ đồ chuyển hoá từ Triolein đến Z. Đầu tiên, Triolein được hydrogenation (điều chế trong môi trường H2 dưới áp suất, tác dụng của nickel) để tạo ra sản phẩm X. Sau đó, X được xử lý bằng NaOH ở nhiệt độ để tạo ra Y. Cuối cùng, Y thực hiện phản ứng với HCl để tạo ra sản phẩm Z.

Dựa vào sơ đồ chuyển hoá, ta thấy rằng axit oleic (C18H34O2) là một thành phần của Triolein. Khi Triolein trải qua quá trình hydrogenation, axit oleic sẽ chuyển thành axit stearic (C18H36O2). Vì vậy, sản phẩm Z trong sơ đồ chuyển hoá sẽ là axit stearic.

Vậy, câu trả lời cho câu hỏi là:

C. axit stearic.