69.Three cellphone service providers form a joint venture to__________.(A) strengthen their relation
70.Acording to the what can users do if they lose their smart phones?(A) Stop the luneting of niet p
22. Finally, my thanks go to my tutor, who has offered a lot of suggestions and comments on my paper
23. Walking alone in the dark, the boy whistled to ________ his courage.(A). hold up(B). keep up(C).