... performing C. performance D. performer 5. This matter is very _____. Don’t discuss it outside the office. A. confidence B. confident C. confidently D. confidential 6. The gas from the chemical ... attempt, bother, care(phủ định hoặc nghi vấn), choose, claim, condescend, consent, decide, demand, determine, bedetermined,endeavour,fail, forget, guarantee, happen, hesitate,hope, know, learn, long, ... management ); -tion, -ion (repetition, decision ); -ence (reference, dependence). Chỉ người thì thêm các phụ tố như –ee (empoyee), -er (teacher), -or (competitor), -ist (dentist ) Danh từ được...