[ 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:
Lexico and Grammar › ViewIn fact, to move at any speed the polar bear uses ______ do most other mammals.
A. twice energy more than
B. more than twice energy
C. twice as much energy as
D. much as twice energy as
Homonyms › View
Harold ___ his thanks before he eats every meal.
a. praise
b. prays
c. preys
I’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
