[ Grammar ]
There are dozens of TV channels, ____________operate 24 hours a day.
A. some
B. some of which
C. some of those
D. some of them

Random Topics:
Determiners & QuantifiersIf ConditionalsComparative Adjectiveand, so, but, becauseModal VerbsTransitionsVerbs & AdverbsVOCAB & GRAMMARContractions and ConjunctionsPresent Simple Tense PassiveOther quiz:
Perfect Tenses › ViewShe (visit) her Japanese relatives once in 1993 before she moved in with them in 1996.
A. had visited
B. has visited
C. will have visited
Grammar › View
The __________ scientist continued his research in secret.
A. famous
B. infamous
C. notable
D. anonymous
Grammar › View……….Amazon River is in Brazil.
A. The
B. a
C. –
D. an
Gerund and Infinitive › View
She really enjoys ……………. pictures of sunsets.
A. take
B. to take
C. taking
