I can’t say which type of tea tastes better. It’s just a(an) ______ of personal preference.
-- Excuse me, may I ask you some questions? -- Sorry, I’m too busy and I haven’t even a minute to _______.
I tried phoning her office, but I couldn’t ______.
There _____ a lot of coal mines in the south, but many of them have been closed or are _____ be closed.
-- Was the judge _______ with the result? -- I don’t think so. But perhaps no judge is easy _______.
The newly published book, which refers ______ basic English grammar, is ______only for beginners.