The Dutch giant Elsevier, which claims to publish 25% of the scientific papers produced in the world, made profits of more than £900m last year这里为什么要用of more than而不直接用More than呢?
A:Sally, did you get a chance to look over the budgets that I gave you?B:Sure did, Beth. They looked OK, but I thought they needed more detail.对话中的thougth,needed为什么要用一般过去时态,而不用一般现在时态?