1. These abbreviations are …………………………..used in writing letters. (common)

2. Seven is my …………………………….number. (luck)

3. He didn’t go to school because of his …………………………………..(sick)

4. My father always ……………………..me to do such a good thing. (courage)

5. Faraday spent his childhood in ………………………………..(poor)

6. He looked very……………….because the messenger came to invite him to the laboratory. (excite)

7. The generator is one of Faraday’s most important ………………………(achieve)

8. We have a good ………………………….with our neighbors. (relative)

9. She wants to look …………………..(nature)

10. They solved the problem ……………………………….(difficult)