giúp tớ với ạaa

Một thấu kính hội tụ có tiêu cự là 60cm, đặt vật AB cách thấu kính khoảng 20cm. Xác định vị trí của ảnh và độ phóng đại.

Exercise 1: Rewrite the following sentence in such away that it means almost the same as the sentence printed before it

 a. People say that Nam is good at playing guitar

=>Nam is said______________

b. It is said that you were in Paris theno

=>You_______________________________________

Exercise 2: Rewrite the following sentence using a present partiapial phrase

 a. There are some children who are playing in the backyard of the house

=>

b. Astronouts who are orbiting the earth in space capsules are weightless

 =>