44（）

单项选择题What is the problem with a “Bug （）

A．It does not go smoothly.
B．It is not comfortable in winter.
C．It splashes mud and water.
D．It travels too slowly.

单项选择题Which of the following operations may be dangerous（）

A．Overfilling the cooker with food and water.
B．Cleaning the cooker with detergent.
C．Cooling the cooker with cold water.
D．Setting too little cooking time.