Write the past simple fopm of the verds in brackets. 1. go) to the cinema last week. 2. how many books ( you/ buy)? 3. - yes, (be) but their son ( not/ be). 4. - how much ( you/ spend) on your camera? 5.- i ( spend) about $ 100. 6. where ( he/ find) this book? 7. she( have) lunch at work? 8. my parents ( decide) to paint the house. 9.i'm sorry, i not/ do) my homework last night. 10. ( not/ travel) to paris in 2018. write 5 sentences about what you did last weekend. 1. 2. 3. 4. 5. choose the correct response. 1. do any of these look familiar? a. somme and a camera. 3. what does it look like? b. yes, what can ldo for you? 4. excuse me. is shis mr brown' s office? c. yes, the one in the corner is mine. 5. here you are. d. it's blsck with a silver handle. 2. what was in it? e. thank you.
2ca + o2 = 2cao4al + 3o2 = 2al2o3
2hgo = 2hg + o2