皮皮学，免费搜题
登录
搜题
【单选题】
The job required ________did it ________careful and brave enough. [ ]A.
who; is
B.
whom; was
C.
whomever; were
D.
whoever; be
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】An organizational structure that contains only line positions and no staff positions is referred to as a _____ organization.
A.
line
B.
staff
C.
line-and-staff
D.
tall
【单选题】An organizational structure that contains only line positions and no staff positions is referred to as a _____ organization.
A.
line
B.
staff
C.
line-and-staff
【单选题】A combination of corrosion and erosion caused wastage in the main ballast line，which directly led to the leak ______．
A.
draff
B.
wastage
C.
mullock
D.
obsolete
【单选题】The runners________ several times ________their positions on the starting line, otherwise they will be kicked out.
A.
are warned, making up
B.
warn, to make up
C.
have been warned, to take up
D.
warn, to have taken up
相关题目：