弗洛伊德把性心理发展阶段分为5个时期。性蕾期的时间段是( )
A.3岁至5或6岁B.18个月到3岁C.6岁持续到12岁D.出生持续到大约18个月
参考答案:A
一What are you going to do this weekend?
一Well,we’ll clean up the city parks _______ it rains .
A.if
B.until
C.while
D.unless