把D代入原句: To obtain an investment-grade rating would keep the county's future borrowing costs low, protecting its already-tattered image, and increase its ability to buy bond insurance.
你说的verbal的36题是OG么,还是OG verbal还是什么,我没有找到。be capable of being是对的,但是一般不会是top选项,因为总会有can啊be able to啊这些更简练精准的选择的,在manhattan sc里面刚才我看了一下,是列在idioms的SUSPECT类里面的