314. Half of the employers expressed worries about employees' basic literacy and numerac skills, while the biggest problem is with IT skills where two-thirds reported concerns.

英语四级译文:
有一半的雇主表示对员工的基本读写和计算能力表示担忧，而最大的问题在于有三分之二的企业对员工的IT技能感到担忧。

四级词汇讲解:
该句是由表示转折关系的连词while连接的并列句，句子主干为Half of the employers expressed worries..., while the biggest problem is with IT skills。后半句中的where引导的是定语从句，相当于with which, which指代IT skilis。 express worries意为“表示担忧”。