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Nung nóng 5,6 g Fe tác dụng với 6,4 g S ở nhiệt độ cao cho phản ứng xảy ra hoàn toàn. Sau phản ứng thu được mg hỗn hợp chất rắn X. Tính giá trị của m.
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IV. Put the verbs in brackets in the correct verb tense. 1. I’m tired. I might (go) to bed early tonight. 2. When Dave (start) (work) in that factory? 3. My grandparents will (go) to Hanoi this summer. They (want) to visit their friends and some relatives there. 4. How long David and Tome (know) each other? – They (know) each other since 2000. 5. Hung (be) lazy. He (not do) anything at home. He often (spend) hours (lye) on the sofa and (play) video games. 6. Where Ann (be) ? – She (water) the flowers in the garden now. 7. I (lose) my car last night. 8. Students must (complete) all homeworks before class. 9. How you (feel) now? – I’m tired and sleepy. 10. How about your last vacation? – It (be) wonderful. We (travel) to Hawaii by plane. The sea (be) beautiful and the food (be) delicious. We (have) a great time there. V. Change the following sentences into negative (-) and interrogative (?) form 1. Tom has lived in Hanoi since 2005. (-) (?) 2. My mother bought me a new dress yesterday. (-) (?) 3. Hung likes eating candy very much. (-) (?) 4. The cat is standing in front of the television. (-) (?) GIÚP MIK VỚI

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