[ Vocabulary ]
It was a huge _____________ to run the marathon, but he did it!
A. mission
B. system
C. challenge
D. form

Random Topics:
Gerund or InfinitivesPresent Simple or Present ContinuousPhrasal Verb Put & GoNoun ClausesModal Verb in Passive VoiceGrammar and VocabulariesPast and Future TensesConditional Sentence Type 3Linking VerbsPossessive Adjectives VS Possessive PronounsOther quiz:
Grammar › ViewI’d like _________ Paris one day.
A. visiting
B. to visit
C. visiting
D. going to visit
Vocabulary › View
I need to __________ my friend to ask her about the homework.
A. visit
B. call
C. throw
D. clean