宾客们被相互介绍，并正式地握了手。

The guests were introduced and ___formally shook hands.

在团聚期间，家人们以比平常更正式的方式互相问候。

Family members greeted each other more ___formally than usual during the reunion.

在陈述提案之前，他正式地向委员会致辞。

He addressed the committee ___formally before presenting his proposal.