[ Grammar ]
How many astronauts have walked on …… moon?
A. –
B. a
C. an
D. the

Random Topics:
Grammar - Present PerfectPassive Voice - Present TensesAdverbial Clause of Cause and EffectPast Perfect and Past Perfect ContinuousPresent, Past and Future TenseNarrative Tenses & ConditionalsJobsGrammar of Conjunctions and PrepotitionsPrepositions & Prepositional PhrasesPassive Voice Present SimpleOther quiz:
Vocabulary › Viewwatchful; quick to notice; careful and diligent
A. primary
B. observant
Grammar › View
Do you understand? Yes, _______________
A. a few
B. a little