panic set off across the whole country.这句话中是被动语态吗

panic set off across the whole country.这句话中是被动语态吗 Panic set off across the whole country.此句中,为什么不用被动语态? 为什么不用被动 Panic set off across the whole country. The panic set off across the whole country为什么不用though panic set off across the whole country谓语动词为什么不用第三人称单数形式? The panic set off __ country at last.正确答案是C,为什么B不可以? panic set off the whole city before people realized it was a 这句话是被动语态吗  请问这句话是被动语态吗? panic on the stock makert set off （had set off）a wave of sel the TV set needs ( ) 为什么用 mending 而不用 to mend 是被动语态吗 The big news _____ across the whole country.