[ To Infinitive/Bare Infinitive/Gerunds ]
I’m sure that he knows ————– this new machine.
A. to use
B. using
C. how using
D. how to use

Random Topics:
Present Perfect Simple & ContinuousSimple Past ContinuosCountable & Noncountable NounsPresent Perfect and Past TensesNarrative, Past TensesConditional and Mix Conditional SentenceAdverb and Noun ClausesGrammar: Defining Relative ClausesGrammar, Conditional Sentences, VocabularyComparative - SuperlativeOther quiz:
Grammar › ViewWhat is the complete predicate of the sentence?
My little brother was afraid of the crocodiles.
A. My little brother
B. was
C. was afraid of the crocodiles.
D. the crocodiles.
Present Tense › View
In fat, most of my colleagues are so interesting, that I ___ (think) of writing a bool about them!
A. am thinking
B. think
C. thought
D. have thought
Sentence Structure and Conjunctions › ViewWhat is the subordinating conjunction?
We had fun while we were at the park.
A. while
B. fun
C. at
D. were
Grammar › View
Alexander _____ taking his driver’s test next week.
A. is
B. are
C. will
D. was
