[ Grammar ]
He was ill and fell _____ his work.
A. behind
B. behind with
C. behind on
D. behind for

Random Topics:
Vocabulary Spelling GrammarComparison Degree & GerundsRelative Clauses and etcAction VerbPast Tense (Regular and Irregular)Grammar: was/wereInfinitive GerundSubject/Verb Agreement with Collective NounsSimple Present VS Present ContinuousRoot WordOther quiz:
Grammar › ViewDo the cows have a tail?
A. No, they don´t
B. Yes, they do
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What does your father do ………..his free time?
A. in
B. at
C. on
D. while