题目

Here are all the books I have.You may borrow _______ you like. A. that B. which C. however D. whichever 答案：D 解析: 本题考查名词性从句。因为前一句话提供了选择的范围，所以此处用whichever，表示“无论哪一个” 。18．--It's getting dark outside．I must be off now．Stay in touch．（　　）A．Be easyB．Take careC．Go slowlyD．Stay Longer