1. Let's begin the conference. A Shall we begin the conference now? B Do we begin the conference now? C Must we begin the conference now? D Are we begin the conference now? 2. The traffic is heavy during rush hours so they are sometimes late for school A. If the traffic is not heavy during rush hours, they are not sometimes late for school. B. If the traffic were not heavy during rush hours, they would not be sometimes late for school. C. The heavy traffic during rush hours should not make them be late for school. D. In spite the traffic is heavy during rush hours, they are not sometimes late for school. 3. Air .............. makes our health worse and worse. A pollute B polluted C pollution D polluting 4. The teacher has explained the lesson (chuyển passive) A The lesson has been explain by the teacher. B The lesson is taught by the teacher. C The lesson has been explained by the teacher D The lesson has been explaining by the teacher. 5. Xếp câu hoàn chỉnh: If / today/ Sunday/ I / invite/ you/ go to the cinema. A If today is Sunday, I invite you go to the cinema. B If today were Sunday, I would invite you to go to the cinema. C If today has been Sunday, I will I invite you to go to the cinema. D If today will be Sunday, I will be invite you to go to the cinema. 6. How do people make carpets? (chuyển passive) A How are carpets make? B How do carpets made? C How are carpets made? D How do carpets make? Giúp mình với