题目内容：

New research（研究) about how much time people spend on their smartphones(智能手机) per day.

1.People cannot use the smartphones to _________________

A. read e-books   B. send text messages  C. take photos    D. play football

2.Smartphone owner spends most of the time _______________ every day.

A. surfing on the internet           B. listening to music

C. watching videos                D. making phone calls

3.Making phone calls with the smartphone was only the _____ most popular use.

A. first          B．sixth         C. twelfth           D. fifth