Study

Unit 7 Tenses

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  • The species (is protected / is protecting) in many other countries, too: Sweden, Finland, Poland, the Czech Republic and it (is/was) illegal to catch, kill or harm it.
    is protected, is
  • The plant (is / was) popular with collectors around the world because its large pink and purple flowers are very pretty.
    is
  • That's why the black lace cactus (also digs and takes / is also dug and taken) home for private collections.
    is also dug and taken
  • The Apollo Butterfly (rarely sees / is rarely seen)
    is rarely seen
  • The black lace cactus (was/is) tiny, only 6 inches tall, and (grows/is grown) alone or in small groups in desert areas in Texas, the US.
    Is, grows
  • Collectors (love / are loving) the beautiful butterfly and (were/are) ready to buy it at $3,000.
    love, are
  • Air pollution and acid rain (are also damaging / are also damaged) their habitat.
    are also damaging
  • In areas where farmers (have cleared / are cleared) the land to plant grass for cattle, the cacti (are disappeared / have disappeared).
    have cleared, have disappeared
  • In our country they (put / have put) the butterfly on the list of endangered species in 1993.
    put
  • The plant (has become / became) endangered because people (are destroying / are destroyed) its habitat.
    has become, are destroying