[ Grammar ]
John doesn’t know how_________the computer on.
A. to switch
B. switching
C. to switching
D. to have switched

Random Topics:
Tenses, Determiners & Subject Verb AgreementGrammar- Later/LatterModal "Have to"There is or There areComplex PrepositionsModals and PhrasesPresent Continuos TensePresent tense AffirmativePresent Tenses and VocabularyPast Continuous Tense & Past ModalsOther quiz:
Grammar › View. Among all the students in my class, Lisa is ____ at solving equations.
A. good
B. better
C. best
D. more good
E. the best
Mixed General Quiz › View
Tourism is ___ state’s most important industry.
a. a
b. the
c. an
There are always regional __________ in every country.
A. differs
B. different
C. differences
Modals › View
You ___________ send text messages when you are driving.
A. haven’t
B. hasn’t
C. should
D. mustn’t
