KeysforUnit7一、完型填空1-5DCBBA6-10ABCBD11-15DBCDA16-20BCCDA二、阅读理解21-25
DBCCD26-30BDBBC31-35DBBCD三、完成句子36
disagreedideas/words37
Itseemsthatis38
sucha39
take/haveholiday/vacationwhenpossible40
flyup四、词汇填空41
lessfewer42
more43
much44
astronaut45
probably46
polluted47
believe48
Scientists49
dangerous五、词汇运用50
predictions51
peace52
envionment53
factories54
building55
plant56
apartment57
shapes58
servants59
Dirty六、语法填空60
However61
paid62
successfully63
wassent64
such65
willstay66
which67
succeeds68
after/following69
Its勘误：完型填空10
Dnever改为cameback增加11
alreadyB
stillC
