[ Infinitive and Gerund ]
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:
Grammar › View” What did you do when you lived in Hawaii?”
” We would go ____ almost everyday.”
A. to surf
B. surfing
C. for surfing
D. on surfing
Past Perfect & Past Simple › View
Many of the people who attended Major Gordon’s funeral ____ him for many years.
A. haven’t seen
B. hadn’t seen
Grammar › ViewA: 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
