频率副词 always, often, sometimes — 英语填空题

根据提示，选择 always、often 或 sometimes 填空（每个词只用一次）。1. Lily helps her mother cook dinner five days a week. She ___ helps her mother cook dinner. 2. Mary reads with her grandpa every day. She ___ reads with her grandpa. 3. Ben plays games with his family once a month. He ___ plays games with his family.