单项选择题
（）formal occasions， you should talk about some world issues or social problems， not about yourself or your family.
A.In
B.At
C.On
D.By
点击查看答案&解析
相关考题
-
单项选择题
Onlyafterthestudentshavemasteredtherulesofpronunciation（）.
A.can they memorize words more easily
B.when can they memorize words more easily
C.then they can memorize words more easily
D.when they can memorize words more easily -
单项选择题
Whynot（）toProfessorSmithforadvice？Heisanexpertinthisfield.
A.go
B.your going
C.to go
D.you go -
单项选择题
Wehadapartylastmonth，anditwasalotoffun，solet’shave（）onethismonth.
A.other
B.more
C.the other
D.another
