[ Vocabulary ]
Experts say that the _______ of the world could be over 7 billion by the year 2015.
A. number
B. population
C. rate
D. quantity

Random Topics:
Modal Verbs for PossibilityPassive of Modal VerbsActive & PassiveFuture Time and TensesPast TensePast TensesLinking Verbs and TensesSubject/Verb Agreement with Collective NounsGerund after Prepositions and Certain VerbsComparative AdverbOther quiz:
Mixed General Quiz › ViewTheir plane should be here in no time.
a. Let’s wait for them at the main lobby.
b. Let’s come back tomorrow.
c. Let’s see if they’re at the lobby.
Grammar › View
Identify the article in the sentence “An apple a day keeps the doctor away.”
A. An
B. the
C. a
D. keeps
Relative Clauses and etc › ViewIn a big city like New York, __________ Jodie lives, it isn’t easy to meet people.
A. where
B. which
C. that
D. when
Grammar › View
We … In this restaurant 2 days ago
A. Ate
B. Eaten
C. Eating
D. Eat
