It is quite difficult ____________ how they did that.
A. imagine
B. to imagine
C. imagining

Random Topics:
SuperlativesGerund NounBasic GrammarGerund vs InfinitiveEmployment VocabularyCoordinating and Subordinating ConjunctionsJobsConditional Sentences Type 0, 1 and 2Simple Past ContinuosAdjective OrderOther quiz:
Prepositions › ViewI was visiting my best friend _____ the hospital.
A. Of
B. At
C. In
Grammar › View
Me and my partner can run this free poker league no problem.What is a better way to write this sentence?
A. Me and my partner will have no problem running this free poker league.
B. Me and my partner can run this poker league for free.
C. Running this free poker league is no problem.
D. My partner and I will have no problems running this free poker league.
A: I’m going to learn Spanish.
B: Great! Spanish …………. a beautiful language.
A. is
B. are
Phrasal Verb › View
The Covid-19 pandemic reminds us to respect doctors and nurses, who______ others in our society.
A. go on
B. call back
C. pick up
D. care for