Chọn các đáp án đúng

1. Many outlets _______ by the mudslides last week.

A. were buried B. bury C. has been buried

2. Vast of woodland ________ by fire every year.

A. is destroyed B. will be destroyed C. are destroyed

3. According to the local government, 50 houses _______ by the typhoon up to now.

A. damage B. have been damaged C. are damaged

4. Look! The sky is really dark and the wind is so strong! Our village _______ by a storm.

A. is hit B. has been attacked C. is going to be attacked

5. 185 people ______ during a fire last month.

A. was attacked B. is going to be attacked C. were attacked

6. Thousands of hectares of crops ________ in Sumatra by flood in 2016.

A. are ruined B. were ruined C. was ruined

7. Seedlings _______ for farmers in that village since last week.

A. have been provided B. were provided C. have provided

8. The fire _______ by the fire fighters 2 minutes ago.

A. were put out B. was been put out C. was put out

9. Japan _______ by volcanic eruptions.

A. is often attack B. is often attacked C. is being often attacked

10. Tanjung Jabung _________ by drought in 2014.

A. was hit B. is hit C. was hitting

Find the mistake and correct it.

1. There was a big storm in this village before I came here.

2. Thanks for the prompt financial aids of the government, the life of people in this town had become less miserable.

3. I weren't informed anything about the wildfire last week.

4. Fortunately, they learnt how to do in case of earthquakes before it occurred.

5. All the visitors was prevented from continuing their exploration because of the uninformed landslide.

Rewrite sentences using passive voice.

1. The brave firefighter rescued him out of the time.

—>..................................................

2. The earthquake has destroyed a big number of buildings in the city.

—> ................................................

3. Why didn't they send an ambulance to us?

—> .................................................

4. People donated a lot of clothes, food and drinks to support the victims of the flood.

—> ..................................................

5. Someone took him to the hospital for an immediate surgery.

—> ...............................................

Tính khối lượng cacbon đioxit CO₂ khi đốt cháy 3 gam cacbon.

Nung 2,1 gam bột sắt trong bình chứa oxi, đến khi phản ứng xảy ra hoàn toàn thu được 2 gam một oxit. Xác định CT phân tử của oxit Fe.

Cho 1 gam bột Fe tiếp xúc với oxi một thời gian thu được 1,24 gam hỗn hợp Fe₂O₃ và Fe dư. Tính lượng Fe dư.

Cho ΔMNP vuông tại M, đường cao MH. Gọi D,E lần lượt là chân các đường vuông góc hạ từ H xuống MN và MP.

a) CM: tứ giác MDHE là hình chữ nhật.

b) Gọi A là trung điểm của đoạn HP, CM: ΔDEA vuông.

c) Δ MNP cần thêm điều kiện gì để DE=2EA.

Cho hình bình hành ABCD. Trên các cạnh AB và CD lần lượt lấy các điểm M và N sao cho AM=DN. Đường trung trực của đoạn thẳng BM lần lượt cắt các đường thẳng MN và BC tại E và F. CMR:

a) tứ giác AMND là hình bình hành.

b) tứ giác MEBF là hình thoi.

c) hình bình hành ABCD cần thêm điều kiện gì để tứ giác BCNE là hình thang cân.