[ Grammar ]
The planets are roughly Jupiter-size, the researchers estimate, but their orbits are much ________ out, at 12 billion and 21 billion kilometers.
A. farther
B. further

Random Topics:
Grammar - must & have toMaritime Vocabulary and GrammarArticles and NounsSentence and FragmentGrammar ElementaryDo not or Does notSubject Verb Agreement; Indefinite PronounsMixed TensesPerfect Tenses of VerbsGrammar - TOEICOther quiz:
Ed and Ing Endings › ViewHe ___________ all over for his cat last week.
A. look
B. looked
C. looking
Verbs: Will & Going to › View
Tonight Kevin ________ watch a movie. He downloaded The Justice League.
A. is going to
B. will
C. ‘ll
D. am going to
Conditionals › ViewI’m sure you’ll pass the exam as _____ as you study hard.
A. short
B. long
C. providing
D. condition
Conjunction › View
The florist delivered red roses ________ the customer wanted pink ones.
A. but
B. because
C. so
