【C18】A．weakenedB．reducedC．diminishedD．decreased

【C9】A．doubledB．reducedC．redoubledD．increased

【C20】A．restrainB．curbC．decreaseD．lessen

【C4】A．causedB．reducedC．adaptedD．compelled

【C2】A．declineB．shrinkC．decreaseD．contract

【C5】A．remainB．increaseC．decreaseD．vary

For their own safety, household pets should be______to their own yard.A．confinedB．reducedC