是on January,2010还是in January,2010?

是on January,2010还是in January,2010? 是On January还是In January 是In January 1,1999还是On January 1,1999 JANUARY 用IN还是ON On January 2011对吗?是用on 还是in? His birthday is-----------------january,中间是in还是on, January.1699前面用in,还是on in stock on january 16, 月份前用的是什么 介词 in 还是 onI was born on January eleventh.It's so cold in January. Spring Festival is in January是对还是错? 英语翻译应该是In 1943 January还是In January ,1943 为什么? 英语翻译如果说要翻译 在一月一日早上是用in the morning of the 1st of January 呢,还是用on the morning of the 1st of January my brother was born （ ） the morning of January 1 用in还是on? The first month_____ a year is January.是用 in 还是of?还是两者都可以? in january还是on?还有My family usually clean(clean要不要加s,为什么)the house. He was _____ on january 27th ,1756,in Austria. 一句话：The best time to visit China is (in January还是January)帮帮忙 My birthday is （ ） January and peter's birthday is （ ） March 26th在括号内填in on at 还是for 或不填