The basic unit in the study of morphology is ______.
B
正如音位是音系学研究中的基本单位一样，词素是形态学研究中的基本单位。
Thereply,whenitfinallycame,was________thenegative.
Thevolunteerswouldrathergobytrainthan________.
Linguistscanconcentrateonalltheaspectsoflanguageatonce.
―________ fine day it is today!
Ifpaymentisnotreceived,legalactionwillbeouronly________.