8. Complete the sentences with could/couldn’t or was/were able to. 1.She … sing beautifully in her childhood.
2.She wasn't at home when I called, but I … contact her at her office.
3.My father … meet me at the airport yesterday, because he was busy in the office.
4.I looked everywhere for the book but I … find
it.
5.They didn‟t have any tomatoes in the first shop, but I … find them in the next shop.
6.Tom … drive but he didn‟t have a car.
7.I … understand English and German when I was a child.
8.She can‟t run very fast now, but when she was at school she … run faster than her friends.
9.Jack was an excellent tennis player, he … beat anyone.
10.When I arrived, I … see a few people waiting for the train.
11.I … hear what they were saying because the music was too loud.
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.