f The astronomer William Herschel had asister, Caroline. Her research contributed to his discoveries.
g Paul McCartney has a daughter, Stella. Her career in fashion design has been very successful.
4 Rewrite each pair of sentences as one sentence, usingwhich. Make any necessary changes.
a The wmdcelIcomes from the Latincella.This means a smalI roam.
me,.word.cdt.c.oru.e,S ..Jroru..l~e, ..LaliV1..ce,lIa.WYl;c.~ ..I1Ae,tlV1.s.a.sl1Aall..rooru..
b AlI celIs have a membrane m skin. It covers the celI.
c Inside the celI is a substance called the cytaplasm. It contains
a number of chemicals.
d AlI cells contain DNA. This holds genetic infmmation.
Celi membrane
RNA DNA Cytoplasm
)
Nucleus
\
I'
e They also contain RNA. It includes the infmmation the celIs
need to build proteins.
f AlI celIs contain a nucleus. This controls the actions of the celI.
g Bacteria consist of only one celI. This can divide and make
other new bacteria.
h One of the most complex structures is the human body.
It contains over 100,000 billion cells.
5 Rewrite each pair of sentences as one sentence, containing the relative pronoun in capitals, or zero pronoun.
a Einstein is a scientist. I admire him.
...BiV1.Sle,iV1...is ..tl ..Sc.;e,V1.lisl ..w~o ..l ..adYlAjre, ...
b Shakespeare is a writer. I don 't understand him.
WHO
ZERO
c Marie Curie is a scientist. We are studying her. WHOM
d Newton is a physicist. We often discuss him. ZERO
e Homer is an ancient Greek writer. We study him in translation. WHO
f Leonardo is an artist. Everybody knows him. THAT
g lane Austen is an authar. Most people enjoy her. ZERO
G
h Beethoven is a compaser. I like him. THAT