Are there thirty-one days in April?

Are there thirty-one days in April? There are( )days in January.A:thirty B:thirty-first C:thirty-one There are thirty-five there are ( ) months with ( ) days in a year.there are ( ) months with ( ) days in a year.A:twelev;thirty-one B:eight;thirty-oneC:seven;thirty D:four;thirty答案是D为什么?为什么不是A? there are thirty-five students in my Everyone likes to buy things __ a good price.A.in B.on C.atTom ,____students are there in your class?----_____ .A.how much；Thirty one B.how many；Thirty oneC.how many；Thirty---one 单项选择 there are thirty students in our class.(对there提问) There are thirty students in my class改为疑问句 there are -thirty--- students in the ciass.对划线提问 There are thirty students in my class.的否定句? There are thirty girls in the classroom根据答句写问句 There are (thirty)days in June.对括号部分提问. there are (thirty)teachers in this school.对括号提问 There are thirty-three toy trains in the tree.翻译 There are thirty-two rooms in this building改为问句 There are thirty-five students in our class.中对 thirty-five students提问,怎么回答? one thirty one thirty 什么中文意思 There are twelve months----a year and there are usually thirty days------a month需要理由