B.
Word-order:
1.the President / According / the head / the Constitution /is/ the state / to / of /.
2.crosses/is/of/The British/made/three/flag/up.
3.on / the Thames/is/ the banks / London/of/ situated/.
4.our / the scientific / centre / Kyiv / country /is/ and / of cultural.
5.of/Motherland / are/ their / Ukrainians / proud/.
6.divided / branches / State / into / power / three /is/.
Of course they looks ugly, but they make useful things such as collecting rubbish. But also this insects have disadvantages too and this disadvantages are really very serious! The mail problem of them it's their ability to spread infections.
In conclusion i want to add that we need to overcome problems which connected with insects, but we mustn't kill them, because insects also make a lot of usefull things for us.