[ Grammar ]
Choose the correct option to complete the sentences:
Companies ___________ look after existing customers carefully because it is expensive to get new customers.
___
A. need to
B. don’t have to

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Kinds of SentencesAdjectives (-ed / -ing)Will and Going toAuxiliary Verbs & Question TagsPast and Present TensesConjunctionPhrase and ClauseGerunds, Infinitives and ParticiplesPrepositions Of PlaceSo....that... Such.......thatOther quiz:
Modal Verbs › ViewIf you don’t understand the lesson, you ___ ask the teacher.
A. should
B. must
C. may
D. can
Vocabulary › View
Has an isometry that maps the figure onto itself.
A. Symmetry
B. Isometry
C. Iscolese
D. Copy
Grammar › ViewNeither Sam, nor Alice—responsible for the damages.
A. are
B. is
C. were
D. none of the above
Comparatives or Superlatives › View
Football is … than chess.
A. more excitting
B. excitinger
C. more exciting
