Write the correct form of each verb in brackets.

1. I recommended (collect) _______ old electronic devices.

2. The sales assistant suggested that I (exchange) _______ the digital music player I bought last month.

3. The teacher advised that we (access) _______ the Internet for extra information about our lecture.

4. The doctor advised (not use) _______ digital devices before bedtime.

5. My classmate recommended that I (have) _______ the PC repaired as soon as possible.