It's surprising how few people knew that Charlie was having money problems but I suppose it was because he had kept it to himself.

English as a Second Language Single question discussions
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It's surprising how few people knew that Charlie was having money problems but I suppose it was because he had kept it to himself. (*) looked after it (*) locked it up (*) held it tightly (*) kept it secret

This is a companion discussion topic for the original entry at https://english.best/questions/23809,its-surprising-how-few-people-knew-that-charlie-was-having-money-problems-but-i-suppose-it-was-because-he-had-ukept-it-to-himselfu/