请把下列句子译成汉语,选出答案并说明理由,
请把下列句子译成汉语,选出答案并说明理由,
1、We have never seen Mike______like that before.
A.act B.acted C.was acting D.to act
2、I will remember the days____I spent with my classmates in Junior School for ever.
A.who B.when C.that D.where
3、It is_____to work out this problem.You needn't go to the teacher.
A.enough easy B.easily enough C.easy enough D.very easily.