[ Countable - Uncountable ]
The famous scientist is conducting ___ experiment to prove his theory.
A. an
B. some
Random Topics:
Past simple - Irregular VerbsPrepositional PhraseGrammar: is/are/was/wereas...as, comparatives, superlativesFrequencyTenses & AffixesParticiple - ing/ edPast Tense vs Present Perfect TenseRelative & ModalsPassive Voice - Present ContinuousOther quiz:
Grammar › ViewChoose the correct verb tense to complete the sentence. She ___ her work before going to bed.
A. finish
B. finished
C. finishing
Simple vs Present Continuous Tenses › View
Don’t take those books. They ……………………….. to you.
A. belong
B. belonged
C. do not belong
D. will belong
Grammar & Vocabulary › ViewI don’t _____ my homework, Can you help me?
A. believe
B. understand
C. know
D. do
Grammar › View
It _____________________________ for three weeks, so the land was dry.
A. has been raining
B. hadn’t rained
C. had been raining
D. was raining