1.Tom's___(ill)is very bad.2.Every day we must clean our___(tooth).

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1.Tom's___(ill)is very bad.2.Every day we must clean our___(tooth).

1.Tom's___(ill)is very bad.2.Every day we must clean our___(tooth).
1.Tom's___(ill)is very bad.2.Every day we must clean our___(tooth).

1.Tom's___(ill)is very bad.2.Every day we must clean our___(tooth).
illness teeth

illness,teeth

ill的名词illness,是不可数名词;tooth是可数名词,但其负数是不规则的,是teeth.

Tom's (illness) is very bad. 2.Every day we must clean our (teeth).