311.n. act of dragging or pulling with a rope or chain

　　(a) deposit

　　(b) tow

　　(c) adjustment

　　(d) area

　　312.n. standard against which something is measured; factor; discipline

　　(a) surface

　　(b) applicant

　　(c) gratuity

　　(d) criterion

　　313.n. wages; living; stronghold

　　(a) retailer

　　(b) pose

　　(c) keep

　　(d) coincidence

　　314.n. gross error; stupid mistake

　　(a) response

　　(b) food

　　(c) commodity

　　(d) blunder

　　315.n. state of losing property to one's creditor's due to unpaid debts; insolvency

　　(a) gap

　　(b) present

　　(c) bankruptcy

　　(d) inspiration

　　正确答案:bdcdc