6、ngonlinetoolsatschool.(2)Threeimportantkindsofdigitallearningarementionedinthepassage.Theyare_______.a.Appsb.smartphonesc.computersd.websitese.mobilesf.WeiboandWechatA. abf B. adf C. bce
7、 D. cde(3)Theunderlinedword"master"inParagraph2mostprobablymeans"_______".A. feel B. hear C. understand D. see(4)Whatistheproblemofdigitallearning?A. Youcan'tcomm