[ Relative Clauses and etc ]
London, __________ is the capital of England, used to be more polluted than it is now.
A. where
B. which
C. who
D. that

Random Topics:
InfinitivesPresent, Past, and Future TimeExclamationVerb + InfinitiveSimple Present ProgressivePast Tense, Recount Text, and Future TenseBasic GrammarHope, Thank, Modal VerbsFuture - will / going to / present continuousSimple Past Irregular & NegativeOther quiz:
Grammar › ViewA How many sweets do your children eat?
B _____.
A. A little
B. A few
C. Any
Prepositions › View
Is your birthday ___ June?
A. at
B. in
C. on
Family Vocabulary and Grammar › View. My sister ___ a scientist in the future.
A. will be
B. is
C. was
D. being
Tenses › View
Which is grammartically correct?
A. I not studying here.
B. She is work in the post office.
C. Where does he works?
D. Is he coming now?