A.We last came to the national park for 3 months ago.
B.It is 3 months when we first came to the national park.
C.We haven't come to the national park for 3 months.
D.I haven't come to any national parks for 3 months.

A.She should have got more practical experiences for her job.
B.Getting more practical experiences for her job is necessary
C.She ought to get more practical experiences for her job.
D.It is possible to get more practical experiences for her job.

A.She should have got more practical experiences for her job.
B.Getting more practical experiences for her job is necessary
C.She ought to get more practical experiences for her job.
D.It is possible to get more practical experiences for her job.

A.into
B.exhausting
C.health
D.academic results

A.through
B.environment
C.are
D.his

A.play
B.to rain
C.afternoon
D.at

A.play
B.to rain
C.afternoon
D.at

A.A larger number of teens are reluctant to give others their online usernames.
B.Most teenage users agree that social media has negative consequences in their lives.
C.More than two-thirds of teens is helped online when facing challenges in their lives.
D.It is less likely that boys are going to make new relationships faster than girls.

A.termination
B.popularity
C.division
D.commencement

A.friends
B.teenage users
C.their teammates
D.online-only friends