[ Plural ]
What is the plural form of tooth?
A. Tooth
B. Tooths
C. Teeths
D. Teeth
E. Teeths

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Present Perfect SimpleModal Verbs and Contrastive ConjunctionsPresent Continuous TenseProgressive Perfect and Simple Verb TensesModals and Semi-ModalsGerund vs InfinitiveDirect Object and Indirect ObjectPresent Perfect Simple & Present Perfect ContinuousDefinite & Indefinite Pronoun & ConditionalsAdverbs, Infinitives, Definite ArticleOther quiz:
Vocabulary › ViewDrinking ______ a person’s ability to think clearly.
A. impaired
B. implode
C. imply
D. infamous
Grammar › View
She ____ cooking two hours ago
A. is finishing
B. finishes
C. finished
Grammar › ViewWe had only one hour, but we _____ the report on time.
A. were able to finish
B. were finished
C. can finish
D. must finish
Helpful Phrases › View
Choose the best response.
Kelly: “I’m having a baby!”
Zhitao: “__________!”
A. That’s great!
B. My pleasure!
C. You’re welcome!
D. How do you spell that!
