下面这些题,Please making\to make\make\makes a telephone call.Listen!She sings\sing\singing\is singing in the room.—What /Where/Who/How are the boy doing?—they are playing games.

下面这些题,Please making\to make\make\makes a telephone call.Listen!She sings\sing\singing\is singing in the room.—What /Where/Who/How are the boy doing?—they are playing games.
下面这些题,
Please making\to make\make\makes a telephone call.
Listen!She sings\sing\singing\is singing in the room.
—What /Where/Who/How are the boy doing?
—they are playing games.

下面这些题,Please making\to make\make\makes a telephone call.Listen!She sings\sing\singing\is singing in the room.—What /Where/Who/How are the boy doing?—they are playing games.
第一个祈使句用make 第二个由Listen可知是现在进行时 用is singing 第三个由答句可知是问内容 用WHAT

make
is singing
What