October 2019 1 34 Report
indicar si esta sustancias son MOLECULAS O COMPUESTOS.
a)

NAI

C20

NH3

b) Describir Dipolo de Hidrogeno.
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Graficar la siguiente funcion F (x) = 2 log₂ₓ
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Put the words into the correct order 4- trip- seen - we - our - volcano - had a - before - never 5 - the - time we - had- up - by - cleaned - arrived - the - she - kitchen ?
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Put the words into the correct order. 1- were- anything - we - hadn´t - all -hungry - eaten - day -so -we- very 2- you - had - seen - Tom- several- times - before? 3- you - restaurant - to - that - had - been - before ?
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Turn the sentences into affirmative negative or interrogative form 4- We had finished the document when the computer crashed . (- ) ( ? ) 5- He hadn´t eaten by the time we arrived (?) ( + ) 6 - We had seen a whale before our trip . ( ? ) ( -) 7- I handn´t done all my homework when I went to class. (?) ( +)
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Turn the sentences into affiormative negative or interrogative form. 1- Alex had travelled alone before his trip to London. (?) ( - ) 2- she hadn´t taught Shakespeare before . ( ? ) ( - ) 3- Had you eaten breakfast when you left the house ? ( + ) ( - )
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Find the mistakes and correct them. 1- she hasn´t prepare dinner. 2-james had cook lunch? 3-they have see never a 3D movie before 2009 4 they have had a house?
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Delete the incorrest tense. past perfect and past simple. 1- we had gone/ went to Rome last year. Ihad never been / was never there before . 2- I had met / met an old school friend last week. I hadn´t seen/ didn´t see her for years. 3- we hadn´t had/ didn´t have any lunch yesterday. When we came home we found that the dog had eaten/ ate it . 4- Ihadn´t been / wasn´t hungry at lunchtime because I´d had/ had something to eat earlier.
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Past perfect and past simple. delete the incorrect tense, 1- two the died in a car crash yesterday. They had just avertaken /just overtook a lorry when the accident had happened/ happened . 2- when Margaret Thatcher had resigned/ resigned in 1990. She had been/ was prime minister for eleven years . 3- Bruce Springsteen had become / became famous with his record Born in the USA , but in fact he had already made / already made several records before then.
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Complete these sentences, put the verbs in brackets into the past tense or past perfect tense. 1- she ----- (feel) sad, because the singer of T. REX ------- ( be killed) in a car crash. 2-clothes ------- (look) very strange, because fashions ------ ( change) a lot. 3-Her hair ------- (turn) grey and she ----- (not like) that.
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Read the sentences and put a ring the action that came first. then write one sentence with the past perfect simple and because. 1- Mike forgot his wallet .He couldn´t play the restaurant bill. 2- Jenny got sunburned . She forgot to put on some sun cream. 3- Jane couldn´t go out . She didn´t do her homework. 4- Sue failed the test . She didn´t revise for it.
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