... twices a weekC.They go to the zoo twices a weekD.They go to the zoo a weekD.They go to the zoo a week twicetwice ONCE A WEEKTWICE A DAYALWAYSHOW OFTENTHREE TIMES A YEARREMEMBER ... :USUALLYSOMETIMESNEVEROFTENEVERY MORNINGEVERY AFTERNOONEVERY EVENING0 4/3 0/1 5 phuongthidakto@yahoo.com 0905.928.825-Learn by heart adverbs of frequency. Make sentences.-Do exercise 1,2,3 ... Yes, they sometime have a picnic.B. Yes, they have sometimes a picnic.B. Yes, they have sometimes a picnic.C. Yes, they have sometimes picnic.C. Yes, they have sometimes picnic.D. Yes, they...