Part A. 
1. Having managed water resources irresponsibly, they had to deal with the water shortages in the region
2 Your brother speaks E well, doesn't he ?
3 It was in VN where held the 22nd SEA GAMEs
4 A burried treasure was believed to have been hidden in the tomb
5 The boy promised not to do it again
PartB
1 She was praised because she has raised 20000$ for wildlife protection
2 It was very generous of Susan to lend me her car
3 I have to leave for LD tomorrow so I cannot fo to the party with you
4 If he had tried his best, he would have won the race
5 Everyone was greatly amused at watching the live show

a
1. Having managed water resources irresponsibly, they had to deal with the water shortages in the region
2 Your brother speaks E well, doesn't he ?
3 It was in VN where held the 22nd SEA GAMEs
4 A burried treasure was believed to have been hidden in the tomb
5 The boy promised not to do it again
b
1 She was praised because she has raised 20000$ for wildlife protection
2 It was very generous of Susan to lend me her car
3 I have to leave for LD tomorrow so I cannot fo to the party with you
4 If he had tried his best, he would have won the race
5 Everyone was greatly amused at watching the live show