1.( ) care of the environment is our duty.A.To taking B.Took C.Taking D.Takes 2.We want to playfootball.Please ( ) us soon.A.join B.join in C.take part in D.joining

Question

1.( ) care of the environment is our duty.A.To taking B.Took C.Taking D.Takes 2.We want to play
football.Please ( ) us soon.
A.join B.join in C.take part in D.joining

Answer 1

1.C 动名词作主语
2.A join意为“参加（某组织）,加入（某处任职）,参加到某个人群中去,从而成为其中一员”. 而且此句为祈使句 用动词原形
join in
意为“参加（正在进行的活动）”,后面接的宾语一般是表示竞赛、娱乐、游戏等活动的名词或V-ing.
take part in
意为“参加,参与（某事物或某活动,如movement, revolution, meeting, conference, conversation, war等）”.