3 Read the text and mark the sentences as T (true) or F (false). 1)Green roofs are a new idea. 2 A green roof always has flowers on it. 3 Green roofs make cities more attractive. 4 Green roofs are a kind of air-conditioner. 5 Sometimes animals and insects live on green roofs. 6 Green roofs are cheap to make.

1) T

2) DS

3) F

4) T

5) f

6) DS

  1. a final group of utilities worth mentioning is designed (present simple passive) for backing up and cleaning up hard disks.2. a data base is (present simple) simply a collection of date that is stored(present simple passive) on one or more computers. 3. the operating system must first be loaded(present simple passive with modal verb) into primary storage.4. multitasking capabilities were once found only on minicomputers and mainframes. (past simple passive)5. utility programs monitor how often and how quickly an application program is being executed compared to all the other programs in the system at the same time. (present simple; present continuous passive)

jill has got five tomatoes, one kilogram of potatoes , seven ice-creams,ten eggs,two sandwiches and seven chocolatesin the shop.