15.B girls 复数用do,enjoy+doing sth.
16.D else 还有什么吗?others 主要指其他人,a lot of =lots of
17.B 她的同学都喜欢她,她也喜欢他们。
18.B with与前面的主语一致,所以是lives
19.A 他看起来不怎么好,我们必须照顾他。look after 照顾
20.D
does live 格林一家人,用单数
running enjoy+doing sth
to go shopping would like to do sth
watching have/has fun (in) doing sth
not tell 祈使句+v原
has
Do know
is
doesn't do
to go