"It's raining heavily,"said Bob,(looking) out of the window.使用looking的原因是什么拜托各位大神The police found there ___ much blood and pieces of glass on the scene of the traffic accident when they arrived.A.being B.is C.was D.were

"It's raining heavily,"said Bob,(looking) out of the window.使用looking的原因是什么拜托各位大神The police found there ___ much blood and pieces of glass on the scene of the traffic accident when they arrived.A.being B.is C.was D.were
"It's raining heavily,"said Bob,(looking) out of the window.使用looking的原因是什么拜托各位大神
The police found there ___ much blood and pieces of glass on the scene of the traffic accident when they arrived.A.being B.is C.was D.were 选A为什么不可以?Two-thirds of the coins dug on the island ___ from 221BC.A.dates B.date C.is dated D.were dated 为什么选B?"It's raining heavily,"said Bob,(looking) out of the window.使用looking的原因是什么

"It's raining heavily,"said Bob,(looking) out of the window.使用looking的原因是什么拜托各位大神The police found there ___ much blood and pieces of glass on the scene of the traffic accident when they arrived.A.being B.is C.was D.were
(1)There be句型,不用被动形式.由句子时态可排除B,再看后面所接的blood、glass都是不可数名词,选C.(2)date back,追溯到……,是一个客观事实,用一般现在时；再由coins可知date要用原形,选B.(3)Bob在说前面这句话的同时望着窗外,用looking表示前一个动作进行时,后一个动作的伴随状态.