简答题The country's economic problems are largely ____ the weakness of the recovery. A、due for B、due in C、due on D、due to简答题It is not profitable to provide bus services in districts where the population is . A、dense B、widely scattered C、concentrated D、huge简答题After my father won a bit of money at the race tracks, he began and gambling everything we had there. A、throwing caution to the winds B、twisting in the wind简答题Many small firms did not in the recession. A、as right as rain B、weather the storm简答题round trip A、往返旅行 B、 单程旅行简答题hand baggage A、手提行李 B、 托运行李简答题"A building or feature of the land which is easily noticed and can be used to judge your position of other buildings or features" means: A、symbol B、sign C、landmark D、mark简答题Meramec Caverns is the largest commercial cave in the state of New Mexico.