1.I’ve got … orange juice.
a) some b) any c) an
2.Let’s buy … peppers.
a) a little b) a few c) any
3.He didn’t buy … tins of tuna.
a) any b) no c) some
4.Mum says that there are … potatoes left.
a) little b) any c) no
5.We … her since primary school.
a) have known b) are knowing c) has been knowing
6.I … already … that film.
a) didn’t…see b) have…saw c) have…seen
7.I … English for 7 years.
a) have been learning b) am learning c) was learning
8.He is very tired because he … all evening.
a) ran b) has run c) has been running
9.They … friends for a long time.
a) were b) have been c) have been being
10.I … just … an Art Club.
a) does join b) have been joining c) have joined
11.We … for the exam for the last 4 days.
a) are studying b) have been studying c) has studying

1.a

2.c

3.a

4.d

5.c

6.a

7.c

8.d

9.a

10.r

1) threatened 2) mammal 3) crops 4) cell 5) diseases 6) composition 7) adapt 8) species 9) environment 10) building blocks 1. biology can be divided into zoology (the study of animal life),  botany (the study of plant life),    molecular biology (the study of how the building blocks of living things, the cells, work)  and genetics (how biological information is passed on from one generation to the next) 2. if you're interested in cells, you should study genetics. 3. zoologists work in many parts of the world. some are trying to protect species, others are investigating wildlife. 4. botanists are looking at the effect new types of food crops have on the environement and how changes in that area can affect our general health. 5. astrobiology is looking at the possibilities of life on other planets.