Question

Put the verbs in brackets in the correct passive tense.
Did you know...?
• The word ‘kremlin’ 1 is used to describe a Russian castle or fortress. The Moscow Kremlin is the best known Kremlin of all.
• The wall around the Moscow Kremlin dates back to 1156, and at first it 2 was made of wood.
• Since then, it 3 has been rebuilt with stones.
• The Kremlin 4 was used as the centre of Russian government until 1712.
• Four palaces and four cathedrals are some of the structures that can 5 be seen at the Kremlin.
• In 1990, the Moscow Kremlin 6 was named a World Heritage Site.
• It 7 is estimated that over a million people visit the Kremlin every year and it 8 will be visited by many more tourists in the future.

Answer 1

1 is used
2 was made
3 has been rebuilt
4 had been used/was used
5 be seen
6 was named
7 is estimated
8 will be visited