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TigersTigers are the (7) ______ members of the cat family. They are the national animals of many countries but some kinds of tigers are endangered because of human activity. Tigers (8) ______________ reach a length of up to 3.3 metres and (9) _____________ as much 300 kilograms. Tigers cubs leave (10) ______________ mother when they are around 2 years age. Everybody knows that tigers are good (11) ______________ swimming and can swim up to 6 kilometres. Tigers usually hunt alone at night time. Tigers are also known to reach speed up to 65 kph. 71. large 2. larger 3. most large 4. largest 81. must should 2. could 3. can 4. must 91. weighes 2. weigh 3. Are weighing 4. weighed 101. they 2. them 3. their 4. theirs 111. in 2. on 3. of 4. at