Topics: 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
Select your answer:

Random Topics:
Adjectives & AdverbsAuxiliary Verbs & Question TagsZero ConditionalAdjectiveIndirect SpeechConditionals and Modal VerbsAdverb and Noun ClausesPresent and Past Simple PassiveGrammar - Reflexive PronounsFigure of SpeechOther quiz:
Grammar › View” Have you been married for long? ”
“Next summer, I ____ for ten years. ”
A. have been married
B. have been marrying
C. will have been married
D. will have been marrying
Future Tenses › View
I _____ this book for tonight’s classes.
A. am going to use
B. am using
