A. do B. are doing C. did D. does
A. are meeting B. met C. to meet D. is meeting
A. moved to B. am in C. am going to move to D. move to
A. am working B. work C. to work D. worked
A. playing B. is playing C. played D. play
A. is moving B. are moved C. are moving D. moving
A. singing B. sang C. sings D. sung
A. are playing B. is playing C. play D. playing
A. has B. are having C. have D. had
A. are singing B. sing C. to sing D. sang
微信支付 
支付宝支付