A. unlocking B. not being locked C. unlocked D. not locking
A. Though it written B. Though written C. It was written D. Written it was
A. are B. were C. being D. been
A. to permit B. permitted C. being permitted D. permitting
A. been made B. has been made C. having been made D. having been making
A. to make B. to have made C. made D. having made
A. appeals for B. appealing for C. appeals to D. appealing to
A. Having seen B. Having been seen C. Seeing D. Seen
A. coming B. who came C. having come D. to come
微信支付 
支付宝支付