A.insured B.covered C.filed D.compensate
单项选择题If you fail to （） your account within ten days, we’ll take a legal action against you for the money due.
A.clean B.clear C.open D.conclude
单项选择题As to terms of payment, we often require letter of credit （） by draft at sight.
A.acceptable B.irrevocable C.available D.confirmed
