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1)follow suit
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English
Verb
follow suit
(card games) To play a card of the same suit as the previous or leading card
(idiomatic) To follow an example; to imitate
If you are not sure of the proper etiquette, watch what others do and follow suit.
2) Every now and then.
English
Pronunciation
Audio (US)help, file
Adverb
now and then
(idiomatic) sometimes; occasionally;
Call your mother now and then and let her know you care.