The children are making so much ______.Ple ase tell them to be quiet.
A：space
B：noise
C：food
D：time
Children should be warned that it's dangerous to open the microwave oven ________ it is still working.
我国幅员辽阔，东西相距5 000多千米，跨经度60多度，这就造成了（ ）
