4．Usually, babies prefer milk with sugar to ______(纯的) milk.

3．These goods are to be ______(运输) to Guangzhou by train.

2．I was ______(全神贯注) in a book and didn’t hear you call.

1．He will ______(受益) from the new way of doing business.

15．C

14．B。考查介词短语辨析。句意：尽管他不时地要做一些兼职的工作，他在学校的成绩总是很好。in spite of“尽管”，表示让步关系；regardless of“不管；不顾”，表示不去考虑后果，强调主观；on account of“由于，因为”；in case of“万一”。

13．C。which替代前面的句子，引导非限制性定语从句，after which“在那之后”。

12．A。to start with“首先”。