两国政府已进行了正式谈判。

The two governments have ___engaged ___in formal negotiations.

活动人士就环境政策进行了热烈的辩论。

The activists ___engaged ___in a spirited debate about environmental policy.

在研讨会期间，我们将对文本进行批判性分析。

During the seminar, we will ___engage ___in critical analysis of the text.