[ Vocabulary ]
How does a volcano form?
A. when ice from glaciers build up
B. when rocks build up around a mountain
C. when lava pushes up through an existing mountain
D. when a lot of lava flows out at one spot and forms a mountain

Random Topics:
Determiners & QuantifiersSimple and Compound SentencesModals of PredictionLinking Verbs & Helping VerbsDEGREE COMPARISONPast Tense and Perfect TenseVocabulary and ModalsSubordinating ConjunctionPast Simple, Present Perfect TenseModal Verbs for Permission and ObligationOther quiz:
Vocabulary › ViewWhat does the word “obscure” mean?
A. To make unclear or less visible
B. To brighten or illuminate
C. To simplify or clarify
D. To enlarge or expand
Vocabulary › View
an explanation for why something happens based on evidence
A. catastrophe
B. evidence
C. conclude
D. theory
Grammar › ViewI _______________ my face at the moment.
A. was washing
B. am washing
Vocabulary and Grammar › View
She ________________ in Bangkok.
A. is live
B. live
C. lives
D. living
