If you meet some new words, you'd better ________ in a dictionary.A.look out themB.look up themC.look them up
---As a student, I can’t afford __________ a new mobile phone.
English is not easy, but I never __________.
---Your help made __________ for me to work out this problem.
---I don’t think _______ Maths is easy.
---Thanks for _________ the new chairperson.