[ Gerund - to Infinitive ]
Children always promise … very well.
A. behaving
B. to behave

Random Topics:
as...as, comparatives, superlativesCoherent Sentence with Correct Grammar StructureGrammar speak,talk,say,tellConjunctions and CommasPossesive Pronouns and Modals of AbilityConditional Type 1Modals and Modal PerfectsPresent and Past Simple PassiveModals and VocabularyGrammar - Present and Past PassiveOther quiz:
Past Tenses › ViewWhen we came to the stadium, the match (already start) ___
A. have already started
B. already started
C. had already started
D. already startes
Vocabulary - Grammar › View
Do you know when we . . . for the summer holidays?
A. hand in
B. get on
C. break up
D. figure out
E. put off