Afew years ago, most manufacturers were not likely to acknowledge that impregnation was a reliable way to seal porous cast or powder-metallurgyparts.

Несколько лет назад большинство производителей вряд ли бы признали, что пропитка является надежным герметизации литых пористых деталей, изготовленных методом порошковой металлургии.

1 (Have you been thinking) of telling him the truth?
2 Simon (has not had) lunch at the Thai restaurant since he got food-poisoning.
3 The reason I'm so wet is that I (have been washing) the car.
4 My brother (has been playing) on his Xbox for nearly six hours – I think he should take a break!
5 So far, his novels (have always been sold) thousands of copies on the first day.
6 There should be some milk left, I don't think we (have drunk) it all.
7 He's still very shaken, even though his friends (have helped) him get over the shock.
8 Paula was reading until midnight, but she still (has not finished) her book.
9 My boyfriend has been more considerate recently. He (has even been opening) doors for me.
10 Emma and Peter (have stayed) at the youth hostel in Blackpool several times.

1 ‘Does he know her well?’ ‘He (has known) her since he was a little boy.’
2 ‘He looks fantastic!’ ‘He (has been going) to the gym a lot recently.’
3 She’s annoyed because he (has been avoiding) her all day.
4 I'm confused because I (have not understood) the question.
5 Have you (seen) Judy today?’ ‘Yes, I saw her at lunchtime.’
6 ‘He (has been feeling) ill since Monday.’ ‘Then why hasn’t he gone to the doctor?’
7 ‘Have they (unpacked) all the boxes yet?’ ‘No, they’ve only just started!’
8 Has he (been eating) enough lately? He looks a bit thin.
9 She has never (travelled) by plane before. She’s scared of flying.
10 I have been (working) on this problem for hours, but I still haven’t solved it.