30 !
1 the jumper (is/has been) washed several times, and it (wasn't/ hasn't) shrunk.

2 nylon (has/has been) produced since 1938 and today it (is/is being) found in many things.

3 the houses of parliament (were/have been) built between 1840 and 1857.

4 scientists hope that a cure for cancer will soon (be / have been) found.

5 each concord (was / had been) built at a cost of 55 million pounds.

6 б) boss says i will (be / have been) given a pay-rise next month.

7 by next year, everybody in the company will (be / have been) given a pay-rise.

8 she will (be / have been) informed about the results of the research as soon as it (is / will be) finished.

9 wait for a while. he (is / is being) interviewed now.

10 he (is being / has been) interviewed for 40 minutes already.