[ Grammar ]
Did you succeed in ________ the problem?
A. solve
B. to solve
C. solving
D. solved

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Simple present/ past/ future tenseFigurative Language VocabularyThere is or There areModal Verbs and ConditionalsCountable and UncountableGerund vs InfinitiveSo - Too - Either - NeitherCoordinate ConjunctionFirst Conditional SentenceVerbs & Phrasal VerbsOther quiz:
Present Perfect Tense › ViewI have learnt English ______ five years already!
A. for
B. since
Vocabulary › View
family members who lived a very long time ago
A. investors
B. reductions
C. ancestors
D. settle down
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A. Simile
B. Metaphor
C. Personification
Grammar - must & have to › View
Someone else other than the speaker has made the decision.
A. can
B. should
C. have to
D. must