Complete these sentences with the correct word “for”, “during”, “while” or “meanwhile”. 49. He’s been on holiday ………………………. three we

Complete these sentences with the correct word “for”, “during”, “while” or “meanwhile”.
49. He’s been on holiday ………………………. three weeks.
50. ………………………. that time, he’s visited his relatives in Australia.
51. ………………………., I’ve been doing his work.
52. ………………………. he has been on holiday, I’ve been doing his work.
53. I’ve been doing his work ………………………. the time he has been away.
54. The crisis arose ……………………. the Managing Director was on holiday and lasted ……………………. the duration of his absence.
55. The crisis arose ……………………. the Managing Director’s absence on holiday. He went to sea ………………………. a few days in his yacht; ………………………., his colleagues were attempting to resolve the problems without him because they were unwilling to disturb him ………………………. he was away.
56. When he returned, he was very angry. ‘Good heavens,’ he said. ‘I’ve only been away
………………………. a fortnight but ………………………. my absence, everything seems to have gone to pieces. There I was, sailing peacefully around the Mediterranean, and ………………………., ………………………. the time I was away, you were trying to solve these problems without telling me.’