A. ten years B. decade C. ten year D. decades
A. those of B. / C. that of D. that in
A. challenge B. approach C. mean D. meaning
A. This B. What C. It D. That
A. he undertook B. did he undertake C. that he undertook D. did he undertook
A. nor she; not to mention B. nor does she; mention not to C. nor does she; not to mention D. nor she; mention not to
A. did create B. do create C. did created D. do created
A. spent B. took C. cost D. spend
A. establish B. recognize C. reflect D. observe
A. provide, for B. provide, with C. offer, for D. supply, for
微信支付 
支付宝支付