The police may need to investigate … before they can make an arrest.
(a) further
(b) farther/further

Random Topics:
Simple and Past TensesEssential and Nonessential Clauses1st ConditionalAbilityModals and ConditionalsPresent Tense vs Present ContinuousModals of ProbabilityInfinitiveCommunicative GrammarVerb Tenses and Subject Verb AgreementOther quiz:
Grammar › ViewChoose the sentence that is punctuated correctly.
A. A clear head, a warm heart, and a willing attitude–these are essential attributes for being successful.
B. A clear head, a warm heart, and a willing attitude these are essential attributes for being successful.
C. A clear head, a warm heart, and a willing attitude these are essential attributes for-being-successful.
Punctuation and Grammar › View
. Where should the comma go in this sentence? “If you want to succeed work hard and stay focused.”
A. After “succeed”
B. After “hard”
C. After “stay”
D. No comma is needed
Conjunctions › ViewThe builders have not __________ started to lay the bricks.
A. yet
B. if
C. for
Direct and Indirect Speech › View
Dad said, “You should tidy up your rooms now.”
A. Dad said that they should tidy up their rooms then.
B. Dad said that they should tidy up your rooms then.
C. Dad said that they should tidy up their rooms now.
D. Dad said they should tidy up their rooms then.
