他正在一个会议上发言。

He is ___speaking at a conference.

她在电话里和朋友聊了很久。

She was ___speaking with her friend on the phone for a long time.

他在学习英语，现在能够进行简单的日常对话了。

He's learning English and now can do basic daily ___conversation.

她在会议上大胆地表达了自己的观点。

She was ___speaking her opinions boldly at the meeting.