[ Gerund and Infinitive ]
The guard refused ___________________ (let) them enter the building.
A. let
B. to let
C. to letting
D. letting

Random Topics:
Modal SpeculationSimple Present Continuous TenseCollective NounsTravel VocabularyAdverbial Clause / If / ComparativesConjunctions & PrepositionsSo / Neither / Either / TooGrammar - much, many, a lot ofGrammar - QuantiflierPossessive Adjectives and Possessive PronounsOther quiz:
Modals of Speculation and Deduction › ViewUse a modal to make a past deduction in the following sentence: ‘The cake is missing, so it ____________ have been eaten.’
A. must have
B. should have
C. could have
D. might have
Tenses › View
– Do you like to ________ snowboarding?
– No, I don’t. It’s too difficult for me.
A. go
B. play
C. do