1.She was halfway to the railway station -------- his boyfri

1。She was halfway to the railway station ___when_____ his boyfriend caught up with her。她在去火车站的半路上时,她的男友追上她了。A。when B。while C。until D。though though是转折关系,与句意不符。until 是“直到。才。” 必须要前一个句子是否定句才可以用。while后面接的句子里的动词要可以持续的动词。catch up with 是瞬间动词,无法持续,因此选A。2。___With_____ the rain falling so heavily,they couldn't go on with their drill。雨下得太大,因此他们无法继续训练。A。Since B。For C。As D。With since 和 for 和 as 一样,都是要接从句的,不能接短语。而with可以接短语,不能接从句。从falling可以看出,第一句不完整,falling前面少了一个was。因此第一句是个短语而不是句子,所以只能选D。