一般现在时和现在进行时练习题 一、选择题练习。 1、Who _ over there now? A、singing B、are sing C、is singing D、sing 2、Its eight oclock. The students _ an English class. A、have B、having C、is having D、are having 3、Listen! The baby _ in the next room. A、crying B、cried C、is crying D、cries 4、Look! The twins _ new sweaters. A、are wearing B、wearing