Correct Answer : 1 [drop behind]

Notes: Many parents assume that their children will drop behind in school if they spend too much time playing video games.

Correct Answer : 2 [drop out]

Notes: Children who drop out of school face a high risk of sexual exploitation, hazardous labor, and living in the street.

Correct Answer : 3 [drop in]

Notes: It is not necessary to attend every class in order to participate, so please drop in and join the fun!

Correct Answer : 4 [drop out]

Notes: Students who are required to pass a test to enter the 9th grade are more likely to drop out prior to entering 10th grade.

Correct Answer : 5 [dropped off]

Notes: A 27-year-old Canadian woman confused the weekend with a weekday and dropped off her 6-year-old at school on a Saturday.

Correct Answer : 6 [dropping in on]

Notes: Visitors attending the annual Open House have the option of either participating in information sessions for their entire duration or dropping in on portions of the seminars based on their schedule and interest.

Correct Answer : 7 [dropping off]

Notes: Special ramps for picking up and dropping off passengers are provided at the curbs of the arrival and departure floors of each terminal.

Correct Answer : 8 [drop in on]

Notes: Unannounced visits are usual on campus, and guests are always welcome. Friends sometimes drop in on one another, but it is mostly relatives who visit each other, and mothers who frequently meet with their daughters.

Correct Answer : 9 [drop in]

Notes: Please drop in between 4:30 and 6:30 p.m. this coming Wednesday November 16 for drinks, hors d'oeuvres, and conversation.

Correct Answer : 10 [drop by]

Notes: Senior Constable Smith asked the suspect to drop by the police station at lunch time in order to answer some questions regarding his alleged involvement in a bank robbery.