earlier, wecouldn’t be waiting here in a queue.

下列各句中，没有语病的一句是（）

May I speak to the headmaster—Heameeting now. Can I take a message

Everyone knows Canada is the second largest country in the world.–That is, it is larger than ___________ country in Asia.

The scientist __________ the experiment forhalf a year, but he _______ yet.