[ 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:
Conditional Type 1 › ViewIf you ______ hurry, you ______ the bus.
A. -, will miss
B. doesn’t, will miss
C. don’t, miss
D. don’t, will miss
Subject Verb Agreement › View
Select the appropriate verb to complete the sentence: The students __ their homework.
A. do
B. ignore
C. start
D. finish
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