Exercise 7 complete
the sentences with an appropriate form of the words in the box
a the population of the world is growing. will
we be.
b one
reason gm crops are science is that we do not k now .
c the engineer want to recreate the woolly
mammoth.
d is it controversial to clone a human ?.
e genetic ethics is a new discipline
Exercise 8complete
these sentences with the verbs in parentheses in the correct tenses
a did he sometimes used (use) the internet
b when the scientist cloned the first animal?
c the woolly
mammoth not existed (not exit) for thousands of years
d do we will be able to(be able to) stop people from getting old in
the future ?