at this/that time of year/day这是什么意思

at this time of day at this time of year与 at this time of the year哪个对? 在一年的这个时候是译成at this time of a year还是at this time of year 还是at it shines ____ (bright) at this time of the year. It is____(wet)at this time of a year. Classes are ____ at this time of year at this time of year这样是否正确? It is so (change)at this time of year this time yesterday?this time of year? 改错The shop is closing at this time of day. 改错,the bank is close at this time of day at this time of day用于什么时态?