We spend about one-third of our lives sleeping. We know relatively little about sleep.
A. We know relatively little about sleep; as a result, we spend about one-third of our lives sleeping
B. Despite spending about one-third of our lives sleeping, we know relatively little about sleep.
C. We shall know more about sleep if we spend more than one-third of our lives sleeping.
D. We spend about one-third of our lives sleeping so that we know relatively little about sleep.

Random Topics:
Past form of ModalsWho am I?“Put” Phrasal VerbArticles & QuantifiersVocabulary and DefinitionsAdjectiveArticles A and AnConjunctions, Prepositions and InterjectionsWish clausePrepositions of TimeOther quiz:
Vocabulary › Viewto care for and educate during childhood
A. to wander around
B. to take away
C. to stumble upon
D. to bring up
Grammar › View
The gun went _________________ by accident and hurt him in the leg.
A. to
B. off
C. on
D. up
Grammar › ViewChoose the predicate. In the house my mom cleans the house.
A. house my mom
B. cleans the house
C. my mom cleans the house
Mixed General Quiz › View
It was an ___ light that shone over the street.
a. eerie
b. Erie
c. eyrie
