1) They _________(tell) when a volcano is dangerous  a) is told b) are told 2) Different scientific insruments___________(use) to collect the data  a) are used b) is use c) are use 3) During an eruption, magma__________(push) to the surface a) are pushed b) is pushed c) were push 4) Many___________(take) by bus to shelters in the next city a) are taked b) is take c) are taken 5) My boss___________(call) at home and he comes to the center right away a) are call b) is call c) was called d) is called 6) This sensor (_is checked /are checked_) by the expert. a) is checked  b) are checked 7) They__________(not allow) to return home for a long time a) isn't allowed  b) aren't allowed 8) Their crops_________(cover) in ash a) is covered b) are cover c) are covered 9) Their homes___________(damage),but they____________(not destroy) a) are damaged-aren't destroyed b) is damaged-aren't destroy 10) The noise_______(hear) a long way away a) are heard b) is heard

Unit 11

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