Поставьте глаголы в скобках в Present Perfect Continuous и в Present Perfect.

Например

1) John had lighted  the candles when she arrived.
2) Saturday afternoon I realized I had packed the wrong stuff.
3) She had cooked lunch before the children came home.
4)  When she arrived at the theatre he bought the tickets.
5)  We had started the experiment before he came.
6) After Jim and Terry had finished their breakfast, they went to fish.
7)  The party had already started by the time I  arrived.
8)  She sealed the letter, put a stamp on it and posted it.
9) He worked hard to build a career.
10) The report noted a complete disregard for the safety
regulations.

1) They have elected the president of the company. 2) The study has (indicated a connection between poverty and crime. 3) have scientists observed a drop in ozone levels over the Antarctic? 4) He has not built a house. 5) She has (printed this text. 6) Where have you … been? 7) I have (seen him today. 8) The computer industry has generated hundreds of new jobs in the area. 9) Scientists have (identified the gene that causes abnormal growth. 10) I have not been  to the theatre for ages. 11) John has been in France for three weeks. 12) My sister has watched the film twice. 13) Our letter has just arrived. 14) How many books has Michael written? 15) A student has interpreted the text.