我每天早上八点都要拨号接入公司的远程会议系统。

I have to ___dial-in to the company's remote meeting system at 8 AM every morning.

摄影师花了半小时仔细调整相机设置，以获得完美的曝光。

The photographer spent half an hour carefully ___adjusting the camera settings for perfect exposure.

考试前，他需要集中注意力复习功课。

Before the exam, he needs to ___focus in and focus on his studies.