[ TOEFL ]
Researchers have long debated _____________ Saturn’s moon Titan contains hydrocarbon oceans and lakes.
A. over it
B. whether it
C. whether
D. whetherover

Random Topics:
QuantifierConditionals III - Mixed 1st, 2nd & 3rd ConditionalsRun-On SentencesPresent Continuos TensePossessive Adjectives VS Possessive PronounsTime Clauses of FuturePhrase or ClauseNoun ClausesWh QuestionsPast Perfect Simple TenseOther quiz:
Grammar › ViewA boy found a wallet on the street ________ he was walking to school.
A. when
B. this time
C. what time
D. while
Sentence Completion › View
Eun Sook raised her hand —– she knew the answer to the teacher’s question.
A. because
B. during
C. due to
D. even
Tenses › ViewThis woman (have) __________ dinner at school every day.
A. Present Continuous – is having
B. Simple Present – has
C. Present Continuous – has
D. Simple Present – have
Mixed General Quiz › View
People who flock down to Arizona for the winter to ___ the cold winters are called snow birds.
a. enjoys
b. hate
c. escape
d. dislike
e. abstain
