考研考试

【单选题】If individuals (are awakened) (each time as) they begin a dream phase of sleep, they are likely to become irritable (even though) their total amount of sleep (has been) sufficient.
A．are awakened
B．each time as
C．even though
D．has been
网考网参考答案：B
网考网解析：
each time as 改为 each time。each time是名词短语，意思是“每当，每次”，在句子中可以起连词作用，引导时间状语从句，不与as连用。可以这样用的还有一些名词短语和副词，如：every time，next time，the minute，the instant，the moment，directly，instantly，immediately等。 查看试题解析出处>>