I.1d question

2b species

3a variety

4c passed

5b develop

6b natural

7a scientist

8c dry

9a plants

10c school

II.1 new employees are always welcomed by the manager

2 janet was given a present by her colleagues when she retired

3 the photograph was invented by Thomas Edison in 1877

4 an armchair has just been invented by stephen court

5 where will you be sent by your company next year?

6 during the recession people was being made redundant by the film

7 had the package been delivered by a special messenger before you got to the office?

8 the concerts are usually held at the university by the students 

9 the problem is being studied carefully by the scientist

10 two children were found in the forest by the police

1c. are meat eaters

2b. As long as a hand

3c vibrations

4d. they see well in the dark.

5d Sharks often attack people

6a. sharks are being studied.

IV.2 if I knew enough about the machine I could mend it myself

3 if it weren't always so crowded I would ride the bus to work every morning

4 if enough money were spent on cancer research prevention would have been found

5 if nick had got a map he could find the way

6 If  Schroeder didn’t ignore Lucy, she wouldn’t get angry at him.

B.1d head

2a where

3a pour

4a ear

5d knew

6a follow

7a looked after

8a gulf

9b samples

10b three quarters