1 prefer
2 has discovered
3 called
4 was invented
5 focuses
6works
1 Passive -<span>They can be seen
2 </span><span>is headed -passive
3 </span><span>was often left -passive
4 </span><span> were built passive
5 </span><span>had been written -passiv
6 </span><span>is much spoken -passive
7 </span><span>is being tested -passive
8 </span><span> has been already finished - passive
9 </span><span> was told -passive
10 </span><span>will have been answered -passive
11</span><span>was being carried -passive
12 </span><span>will not be admitted -passive</span>
can - cannot - can't
has got - has not got - hasn't got
is - is not - isn't