[ Prepositions ]
Please turn out the lights _____ you go to bed.
A. after
B. as soon as
C. while
D. before

Random Topics:
take, make, doGerunds & Infinitives + VocabularyFuture SimplePast or Present Verb TenseGerund, Infinitive & ModalsAdjectives & PrepositionCountable & Uncountable NounsPast Tense vs Present Perfect TenseThere is, There are, Some, AnyTenses and StructureOther quiz:
Present Continuous › ViewMy parents____thinking about it right now.
A. ‘m not
B. isn’t
C. aren’t
Tenses › View
The police officer________ when I was reading a book.
A. comes
B. came
C. was coming
D. has come
Grammar › ViewYesterday, i ________ my father to the supermarket.
A. follow
B. follows
C. following
D. followed
Past Tenses › View
He (never try) sushi before he (visit) Japan.
A. He had never tried – he visited
B. He never tried – he visited
C. He had never tried – he was visiting
D. He had never tryed – he visited
