using cell phones over a long period of time may be harmful.
举一反三
- ____ using cell phones over a long period of time may be harmful. A: Saying B: It is to be said C: To say D: It is said that
- The medical term for pertaining to time (occurring over a long period of time) is ____.
- ___________(expose) of the body to sunlight for a long time can be harmful.
- Norms may change over a period of time, whereas beliefs and values tend to be much more enduring.
- ( ) is bullying that takes place over digital devices like cell phones, computers, and tablets.