Помогите с задачей! Какую массу оксида меди можно получить при разложении 49 г гидроксида?

Поставьте данные в скобках глаголы в форму либо простого прошедшего,либо настоящего совершенного времени(Past Simple,Present Perfect) 1 I just(tell)you the answer. 2 I(tell)you the answer yesterday. 3John and Richard just(go)away. 4She already(answer)the letter. 5She(answer)the letter on Tuesday. 6John and David(go)away fine minutes ago. 7 I(read)that book in June. 8 I(not, see)him for three years. I want to know where he is. 9 I(fly)over Loch Ness last week. — You (see)the Loch Ness monster? 10 When he (come)?- He (come)at 2,00. 11 I (read)his books when I was at school. I (like)them very much. 12 I can't go out because I (not,do) my work. 13 I (write) the letter but I can't find a stamp. 14 I (leave)home at 8.00 and (get)here at twelve. 15 You (have)breakfast yet?-Yes, I (Have)it at 8.00. 16 I (meet)him last June. 17 You (see) the film last night? 18 The film just (begin).You are a little late. 19The newspaper (come)? — Yes, Ann is reading it. 20 He (break) his leg last year. 21 You (be)here before? — Yes, I (have)my holidays here last year. You (have)a good time? — No, it was raining all the time.

сократить текст)))The Government's strategy for dealing with crime is to sustain the rule of law by preventing crime where possible; to detect culprits when crimes are commited; to commit the guilty and acquit the innocent; to deal firmly, adequately and sensibly with those found guilty; and to provide more effective support for the victims of crime. It is also concerned with ensuring that public confidence in the criminal justice system is maintained and that a proper balance between the rights of the citizen and the needs of community as a whole is maintained.

With continuing concern in Britain, as in many other countries, over rising crime rates, public expenditure on law and order programme reflects the special priority given by the Government to these services. Recent increases have been made to cover, in particular, greater police manpower, the probation service and extra spending on prison building. More than two-thirds of total expenditure is initially incurred by local authorities (with the help of central government grants), mainly on the police service. 

A number of measures to strengthen the criminal justice system have been taken. The Drug Trafficking Offences Act 1986 provides for the pre-trial freezing of suspected drug trafficker's assets, backed up on conviction by immediate confiscation of the assets to the value of the proceeds of the crime; similar provisions are included in the Criminal Justice (Scotland) Act 1987. The Public Order Act 1986 codifies the common law offences of riot, unlawful assembly and affray; enhances the powers of the police to control public processions and assemblies likely to result in serious disorder or disruption; strengethens the law against incitement to racial hatred; and provides additional powers to combat football hooliganism. Under the Criminal Justice Act 1987 a Serious Fraud Office with wide powers to investigate and prosecute serious or complex fraud in England, Wales and Northern Ireland was established in 1988.