Studies suggest that babies learn to ______ voices before birth. They can recognize their mother’s voice among a group of women.

(单选题)The accident which left 15 people on board dead ______ if bo (单选题)I know he feels upset about his failure, and I can ______ th (单选题)As we have entered a new year, the main problem our organiza (单选题)We were told to keep silent while the experiment ______ in t (单选题)He was offered a position at the local church school, ______ (单选题)I got more ______ about him from reading his books than from (单选题)40.（ ） (单选题)39.（ ） (单选题)38.（ ） (单选题)37.（ ）