21- The sky ……… under observation ever
since civilization began.
a) had being
b) has been
c) have been
d) will have
e) has been
ÖZDİL LİSAN VE BİLGİSAYAR KURSLARI
22- If the illness ……… diagnosed a day earlier
it might have made all the difference.
a) had being
b) will have
c) has
d) had been
e) have
23- Nowadays, flying in hot-air balloons ………
become a sport.
a) would have
b) would
c) has been
d) have
e) has
24-Only when we landed did we see how badly
the plane ……… damaged.
a) should
b) would be
c) has
d) had been
e) should have
25- Governments should lay down safety
specifications for manufacturers, as ………
done in the USA.
a) has been
b) would
c) has
d) have
e) have been
26- The American alligator ……… on the
increase since 1973, when the Endangered
species act gave it protection.
a) had
b) had been
c) have been
d) would
e) has been
27- What would you have done if the train ……..
late?
a) had been
b) would have
c) should
d) had
e) would
28- Zurich, which is an over-populated city
and ……… the heart of banking in Switzerland.
a) has been
b) had been
c) has
d) would
e) have
29- When she arrived I ……… waiting for three
hours.
a) had
b) had been
c) would have
d) should have
e) would be
30- Plenty of evidence has come to light to prove
that he ……… involved smuggling.
a) has been
b) would be
c) have
d) have been
e) will have