“It” is often used to a baby

Carl has breakfastat 7:30 am every day.

(2014·辽宁五校第一联合体考试)What impresses me most is________he appears in front of others，he wears a sincere and charming smile

Everybody except the two young boys _______ shocked bythe bad news. People looked at each other in ________.A．was, silence

Not until he went abroad to further hisstudy_______ the importance of English