假设地球自东向西自转，地球上下列地理现象中不会发生变化的是(　　)

A．日、月东升西落现象

B．南半球河流一般右岸多沙滩

C．昼夜现象

D．120°E的地方时早于90°W

—Do you know ______?—Yes. She is doing her homework.

A．what is your sister doing

B．what your sister is doing

C．when your sister is doing homework

D．where is your sister doing homework