When (A) they lose their jobs, they also (B) lose their self-confidence, or believe (C) in

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Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

When (A) they lose their jobs, they also (B) lose their self-confidence, or believe (C) in their own (D) ability

When

also

believe

own

Giải thích

“believe” -> “belief”. Ở đây ta cần một danh từ, vì phía trước đã cùng nhiều danh từ (jobs, self-confidence)