－How much shall I pay for the phone call?－You __________. This is free of charge.

Before I talked with ______scientist, I had never met_____ clever person like him.

Go to bed right away．Don’t forget you need to get upas early as you can ______ the early train．

下列词语中加线字的读音完全相同的一组是 （ ）

Would you like _______________ — ________, but I’m too busy now.