Đặt điểm sáng F trước gương phẳng GG'

a) vẽ tia sáng từ F tới gương, phản xạ trên gương đi qua điểm M cho trước

b) chứng minh rằng đường truyền của tia sáng từ F tới gương tới M là ngắn nhất
Cíuu mee

Giúp mình câu này , mình cần gấp ngay bh 
raI/Choose the word whose underlined part is pronounced differently from the other three in each question.

II: Complete the sentences wwith the correct forms of the verbs in brackets. Use the simple present or present continuous tense.

1. They _______________ (not/ like) that band a lot

2. We always _______________ (visit) grandparents on the weekends.

3. I can’t talk to you right now. I _______________ (study)

4. Ben ___________ (work) as a doctor in a big hospital.

5. I can’t take a shower now. My brother ____________ (use) the bathroom.

6. Sally and her family love (go) ____________ to the park in the summer.

7. Her mum likes (lie) ____________ on the blanket and loves (read) ____________ her favorite magazines.

8. I enjoy (collect) ____________ dolls and it becomes my pleasure.

9. We love (watch) ____________ new films, and we (go) ___________ to watch a new Hollywood film next weekend.