[ Tenses ]
Tina ………… while Bob was watering the plants.
A. cooked
B. was cooking
C. has been cooking

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Modal, Causative Verb & Elliptical StructureVocabulary and PrepositionsTransitional Phrases and ConjunctionsAdjectives & QuantifiersProgressive TensesSimple Present Negative and QuestionBecause / soGrammar and StructureLinking Verbs & Helping VerbsNoun Phrases and AdverbialsOther quiz:
Idioms › View“Of service” means to be ___.
a. efficient
b. useful
c. desirable
Grammar › View
Ching Yi __________ magic tricks for a living.
A. do
B. does