cho các số nguyên a ; b thỏa mãn ( a² + b² ) chia hết cho 7⁴.CMR a x b chia hết cho 7⁴

Complete the facts. Write ONE word in each gap.

1.   Volcanoes can be under the earth or under the __________.

2.   __________ volcanoes can erupt again.

3.   When a volcano erupts, you can see __________ from far away.

4.   When a volcano erupts, __________ can destroy whole towns.

5.   The last time Mount __________ erupted was in 1944.

6.   Surtsey is an __________ that was formed by a submarine volcano.

7.   If a supervolcano erupted, our __________ would change.

8.   __________ volcanoes are the only ones that are not dangerous.

III. Fill in each gap with a word from the box. My name’s Quan. One of my best friends is Phong. He is my classmate and we always go to school (1) ____________. Phong is twelve. He’s tall and rather thin. He has short (2) ____________ black hair and brown eyes. Phong is funny and (3) ____________. I like being with him because he always makes me (4)___________. He is also very sporty and plays football and basketball very (5) ____________. We often play basketball and football at the weekend. He loves music and he plays the guitar. I don’t play any instruments but I love (6) ____________ too. Phong doesn’t like computer games. He likes playing with his friends in the street. Phong is a very good student. His favourite (7) _________ is Maths. He’s not (8) __________ at Science but he studies hard to pass it. 

II. Fill in each blank with a correct preposition. 1. ________ Saturday, I help my parents ________ the field. 2. They are working ________ a milk farm tomorrow. 3. The camp is for kids aged ________ ten and fifteen. 4. Would you like to go to the movies with me ________ Sunday evening? 5. The children are spending a week ________ a summer camp. 6. Nikita likes to read books ________ English. 7. He never takes part ________ team sports. 8. Joana is ________ the phone, chatting ________ her friend.