[ Gerunds and Infinitives ]
It seems difficult __________________ everything about this topic.
A. to knowing
B. know
C. knowing
D. to know

Random Topics:
TOEFLPresent Simple x Present ContinuousGrammar: Imperative and Exclamatory SentencesComparative AdverbGrammar and VocabulariesModals - Have to or ShouldEnglish ArticleDirect and Indirect SpeechVerb Present Simple TenseGrammar - Present PerfectOther quiz:
Articles - rules › Viewused in in the sense of “one” or “any” (She want’s ____ car)
A. no article
B. the
C. a/an
Tenses › View
She’s _____ for the singer. (clap: vỗ tay)
A. clap
B. claps
C. clapping
D. been claps