>「専門(科学)英語の論文読めるんだから、会話できるし書けるだろ。」「英文読めるんだから、会話できるし書けるよな。」
Actually, your boss is right. You should be able to write and speak English as long as you have some skills in reading articles and/or books. Otherwise, it doesn't make sense. I would say exactly the same thing if I were your supervisor. You have no excuse, since your job requires the skills to communicate in English. Period.
My suggestion is to subscribe to any oral materials/sources like ALC's "Hearing Marathon," "Business English Marathon." ALC also offers a new correspondent course featuring research on science/technology. You should check out the website (www.alc.co.jp).
You can also get access to various sources online for free such as NPR, PBS News Hour, or NHK World News. I highly recommend NPR (www.npr.org) and NHK World News(www.nhk.or.jp/nhkword/). If you have an iTune in your laptop, you can search a lot of online radio stations and programs.
お礼
Thank you very much for your helpful answer.