用正确的介词填空。

Mrs．Fang is going to have a baby soon, so someone also will have to take ________ her classes．

用正确的介词填空。

In winter, some places in China will be covered ________ snow．

用正确的介词填空。

________ cold days, I always have to stay at home working on my some novels．

用正确的介词填空。

The Italian pianist will perform in Nanjing this Saturday; on Sunday he will be ________ to Suzhou, where he will give another performance．

用正确的介词填空。

Nothing can prevent us ________ getting in touch with each other．

用正确的介词填空。

They held such a ceremony just ________ memory ________ those who died in the war．

用正确的介词填空。

________ return ________ silk, China received wine, spices, wool and other goods．

用正确的介词填空。

All the machines are now ________ good condition．

用正确的介词填空。

What you are describing should be related ________ the given illustration．

用正确的介词填空。

US President Franklin Roosevelt declared war ________ Japan in 1949．