Bài 1:Cho 1 điểm sáng S đặt trước gương phẳng PQ. Tia tới SI đến gương tại điểm tới I và hợp với gương một góc bằng 30 độ
a)Vẽ đường pháp tuyến NI và tia phản xạ IR
b) Tìm số đo của góc tới
c) Tìm số đo của góc tạo bởi tia phản xạ với gương phẳng
Bài 2 : Cho một vật sáng AB đặt trước gương phẳng
a ) Hãy vẽ ảnh A'B' của vật AB qua gương
b) Biết đầu A của vật cách gương 2m , đầu B cách gương 3 m. Tính khoảng cách AA', BB'
Ex2: Give the correct form of the words given to complete the sentences
1 Go Green is non-profit......................that protects the environment (ORGANISE)
2 Many people was made ........................... after the flood (HOME)
3 We talked to and sang for the ............................ people at the nursing home (OLD)
4 The campaign .......................... to people recycle glass, cans and paper ( COURAGE )
5 The children volunteered to clean up their ............................... and local area ( NEIGHBOUR )
6 There are many of ....................... pollution such as air pollution , land polltution and water pollution ( ENVIROMENT )
7 We're .............................. books and clothes to the children in remote areas ( DONATION )
8 The program was.............................. to both the community and individuals ( BENEFIT )
9 We're worked together for several months to provide good facilities for ..................................people ( ABLE )
10 This project has been funded by...................................... contributions ( VOLUNTEER )
Ex4: Put the verbs in the correct tense
3 I (go) ............................... to work on the week
4 Look ! The plane (fly)..............forwards the airport . It (land ).............................
5 You ( hear ) .................................anything ?
I (listen) ..............................hard but I can't hear anything
Ex5: There is ONE the mistake in each of the following sentences , find out the mistake correct it.
1 His computer is more expensive than me
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2 I like drink apple juice. It's my favourite drink
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3 He is so intelligent as me
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4 Thu is writing a letter to her parents in her room
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5 I and some of my classmates go to school the bus everyday
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6 My son is studying in an university in China
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7 . I prefer to playing table tennis
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