__________ the convenience of digital payment, many senior citizens started to use smart phones.
时间:2020-05-21
人气:1902
A few months after he had arrived in China, Mr. Smith ___________ in love with the people and culture there.
时间:2020-05-21
人气:2417
Unlike traditional gyms, app-backed gyms offer people ___________ options to exercise.
时间:2020-05-21
人气:858