下列单句均有一处错误，指出并改正

Our school is a lot of bigger than yours. ________

下列单句均有一处错误，指出并改正

Although the farm is large, but my dad has only two men working for him. ________

下列单句均有一处错误，指出并改正

Before you leave the lab, making sure the electricity is turned off. ________

下列单句均有一处错误，指出并改正

It will not be long after we finish the experiment. ________

下列单句均有一处错误，指出并改正

Coins may be different sizes. ________

下列单句均有一处错误，指出并改正

Would you like to play a piano? ________

下列单句均有一处错误，指出并改正

His story was excited the little boy. ________

下列单句均有一处错误，指出并改正

It was five o’clock that we finished the work. ________

下列单句均有一处错误，指出并改正

We started at 8:15 but soon it began raining heavily. ________

下列单句均有一处错误，指出并改正

Mother is preparing for the dinner, she can’t help cleaning the table. ________