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2 năm trước
Hòa tan hoàn toàn 15,4 gam hỗn hợp X (gồm Mg và Zn) trong dd HCl dư thấy có 0,6 gam khí H2 bay ra. a) Viết PTHH b) Xác định thành phần phần trăm theo khối lượng các kim loại trong hỗn hợp X
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1 . Put the verbs in brackets into the past simple or the present perfect . 1 Kevin .......has lost ............( lose ) his keys . He .....left ................( leave ) them on the bus yesterday 2 I .......................( not/ play ) tennis since I was at school but I ............................( be ) very good at in back then 3 Mr and Mrs Little ..........................( visit ) Egypt . They .................................( go ) there on holiday in 2007 . 4 A : .............................you ......................................( choose) a dress for the party yet ? B : Yes , I ............................( buy) one yesterday 5 A : ......................................you...............................(see) any new films lately? B :Yes , I .................................( watch) the new James Bond film last week 6 I think our teacher ..................................( forget) about the test ! He has seen ( not / say ) anything about it in the last lesson! 7 Sarah .............................( break) her leg . She ............................( fall) off a horse last week 8 A : ...........................................( you / sell) your house yet ? B: Yes, some people ..........................................(see) it last month and ...................................(buy) it 9 I ...........................................( finish) decorating my room . I ................................( paint) it last week and I ........................................( put up ) the new curtains last night 10 They .................................( lose ) their cat . It ...................................(run ) away last week sai sẽ vote 1* hoặc báo cáo

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