One report concludes that many schools do not have, or likely to have,enough computers to use them effectively. A or B nor C or are D nor are they E nor are not
纠结在B和D中。最后答案是D。我有点不太明白。D中的they指代的是schools,但是后面use them中的them指的是computers。 我一直觉得they them their在一句话中应该要指代一样东西,怎么这里指代两个不同的东西,那不是指代不清了嘛。。。搞不太明白,谁和我说说。。。