Câu 3: Viết đoạn văn tổng phân hợp khoảng 12 câu trình bày cảm nhận của em về tình yêu thương của các nhân vật trong văn bản Chiếc lá cuối cùng. Trong đoạn có sử dụng trợ từ, tình thái từ  

Bài 3: Một bình thông nhau gồm 2 nhánh chứa nước. Người ta đổ thêm dầu hỏa vào 1 nhánh, độ cao cột dầu hỏa là 5 cm. Tính:

a.      Độ chênh lệch mực nước trong 2 nhánh, Biết d nước= 10000 N/m³ , d dầu hỏa= 8000 N/m³ 

b.      Tính độ chênh lệch mặt thoáng chất lỏng trong 2 nhánh?

IV. Rewrite the following sentences in passive voice.
1. The mudslide buried five houses in a village in the eastern region.
_________________________________________________________
2. The volunteers have rescued three cats.
_________________________________________________________
3. They are cutting dead trees on some streets to prepare for the forthcoming storm.
_________________________________________________________
4. We should move the furniture to higher places because of the flood.
_________________________________________________________
5. They had repaired their house before the typhoon came.
_________________________________________________________
6. What kind of injuries do earthquakes cause?
_________________________________________________________
7. The government didn’t warn the people about the possibility of a tsunami.
_________________________________________________________
8. Have the workers restored the damaged bridge yet?
_________________________________________________________
9. I hadn’t put the car into the garage before the hail occurred.
_________________________________________________________
10. We will send rescue workers to the flooded villages.
_________________________________________________________
 

Give the correct form of the verbs in brackets to complete the sentences.
1. All people (go) ______________ down in the cellar for protection by the time the tornado
(sweep)_______________ through the town yesterday.
2. Hundred of trees on streets in Ha Noi (fall) __________________ in a sudden storm last night.
3. I (not seen) ___________________ a more horrible flood than this since I (live) _____________
in this area.
4. The tourists (camp) __________________ near a peaceful river, when all of a sudden, the river
(flood) ____________________ its banks and almost (destroy) ___________________ their
campsite.
5. When the volcano (erupt) ___________________, people living nearby already (move)
_______________ to safe places.
 

II. Complete the sentences with the words in the box
Avalanche    blizzard    disaster     drought    eruption
evacuation    explosion     flood      lightning       tsunami
1. The soldiers have been deployed to help avert a looming environmental ____________ in central
provinces.
2. When I was outside in the ____________, I couldn’t see more than a few feet in front of me
because of the snow.
3. Mum went shopping yesterday afternoon and she was very frightened. In the car park, there was
an ________________ and nobody knew what it was.
4. I saw on TV that yesterday there was an ________________ on an island in the Pacific and hot
lava came down the volcano.
5. My little sister is afraid of __________________, so when there is a bad storm she always hides.
6. Last Sunday we wanted to go skiing, but we couldn’t because in the mountains there was an
____________.
7. Powerful earthquake off the coast in Indonesia sparked a three-metre-high ____________ that
killed at least 113 people.
8. If there is a bad________________ in a town, the people have to travel by boat!
9. After the harshest winter in decades, the western region is now facing its hottest summer and the
worst ____________ across the area in nearly 40 years.
10. People should become familiar with the guidelines for ______________ because natural
disasters can force them to leave their homes.