问答题课程计划
单项选择题Listen! His family must be quarrelling, ______
单项选择题Syntax is the study of______.
单项选择题One day Chuck is on a flight () the Pacific Ocean suddenly () his plane crashed.
A. through while B. through when C. across when D. across while
单项选择题That she hadn't kept her () on her work resulted in the failure.
A. head B. heart C. brain D. mind