a) \(x^2+x+\frac{1}{4}=\left(x+\frac{1}{2}\right)^2\)
b) \(x^2+12xy+36y^2=\left(x+6y\right)^2\)
c) \(4x^2-12xy+9y^2=\left(2x-3y\right)^2\)
d) Không phải hằng đẳng thức \(\left(x^2-2x+4=\left(x-1\right)^2+3\right)\)
e) \(25x^2+4y^2-20xy=\left(5x-2y\right)^2\)
I (write) (1) ....................................... to express my dissatisfaction of my stay at the Lord Hotel in London last weekend. I (book) (2) ...................................... the hotel in Sweden and also (receive) (3) ............................. information about the hotel. I (promise) (4) ................................ a luxury weekend. However, I (be) (5)..................................... not satisfied. The room was comfortable, but the traffic from the road opposite the hotel (make) (6) .................................... it impossible to (sleep) (7) ............................ I (ask) (8) ...................................... for another room, but no single rooms (be) (9) ................................. available. I required room-service one night and I (have) (10) .................................. to wait for almost one hour before someone came.
1. Lan'll have a party ...................... Friday evening.
2. Would you like to come .......... my house ............lunch?
3. She takes care ............. her family.
4. She works .........a local supermarket.
5. My mother works...............the field............. my father.
Many different groups (1)…….…………… people live in tropical rainforests. The Penan people (2)……….………..in Sarawak. Sarawak is in Borneo (3)…… ……………Asia. The Penan people travel (4)………………… the rainforest in families of up to 30 people. Each family has one hut to live in (5)…….……………one smaller hut to sleep in. When they travel, they (6)………. …………………new huts.
The Penan people make flour (7)………..……………sago palm trees. They hunt and eat deer, smaller mammals, and birds. Sometimes they use blowpipes (8)………..…………hunt.
The rainforest is the home of the Penan people, but some other people (9)……….……………..down the trees. Then the rainforest is different. Sometimes the Penan people can’t find the plants that they use (10)……..…………..medicines. Sometimes they cant’ find clean water or food.
Twenty years ago only large companies (1)……………. computers. They were large (2)……………. which filled rooms and they always had big tapes which went round and round. (3)……………. the 1980s one in every tow families (4)……………. Britain had a micro-computer – most schools also had several. (5)……………. new machines were much cheaper and much smaller (6)………………… the older ones. People used them (7)……………. pleasure as well as business. A recent survey showed that over 40% of home computer owners used them mainly for (8)…………….
1. A. have B. had C. has D. having
2. A. machines B. matches C. metal D. factories
3. A. on B. At C. in D. of
4. A. in B. at C. on D. over
5. A. They B. This C. That D. These
6. A. that B. over C. than D. as
7. A. to B. for C. with D. of
8. A. games B. lines C. plays D. changes
1. His plan is (keep) the affair secret.
2. It is dangerous (lean) out of the window.
3. You had better (say) nothing.
4. (Open) the window!
5. He made me (move) my car.
6. You are too young (understand).
7. No (smoke).
Sắp xếp các từ cho sẵn để hoàn thành câu.
1. cosidered/ the husband/ is/ the family/ of/ the head.
2. to/ went/ live/ the bride/ with/ husband's/ her/ family.
1 my suitcase is_______(large)than your suitcase
2 this scarf ______(beautiful) than the one in the window
3 the palace hotel was _______(expensive) than the grosvenor
4 john is a_______(good) gardener than stuart
5 they are not going to the ______(bad) hotel
1. Almost everyone ..................(enjoy) the lecture last night 2. English ...................(teach) in the schools of almost every nation 3. That old red house ...............(build) in the year 1822 4. That proposal ...................(consider) by the members right now 5. Smith ...................(teach) at the University of Washington since 1999 6. The noise from the trains ...................(annoy) me terribly last night
1. They are having a ___________(wonder) time Da Lat 2. My brother is a ___________(collect). He has collected a lt of foreign stamps 3. Getting to the village is very ____________ (interest) journey 4. Many more tourist have visited Ha Long Bay since UNESCO’s _____________ (recognize) of this beautiful spot 5. Bai Dinh pagoda is a _____________ (religion) site which is located in Ninh Binh province 6. Chua Keo is a ___________ (wood) pagoda which was build about 400 years ago
