Поставьте глаголы в скобках в PresentPerfect.
1) They … (elect) the president of the company.
2) The study … (indicate) a connection between poverty and crime.
3) … scientists … (observe) a drop in ozone levels over the Antarctic?
4) He … (not/built) a house.
5) She … (print) this text.
6) Where … you … (be)?
7) I … (see) him today.
8) The computer industry … (generate) hundreds of new jobs in the area.
9) Scientists … (identify) the gene that causes abnormal growth.
10) I … (not/be) to the theatre for ages.
11) John … (be) inFrancefor three weeks.
12) My sister … (watch) the film twice.
13) Our letter … (just/arrive).
14) How many books … Michael … (write)?
15) A student … (interpret) the text.