They boy is an excellent student, and no_爱下问搜题

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问题选择题

They boy is an excellent student, and not once in these years ___caught being late.

A．has he got

B．does he get

C．did he get

D．will he get

答案

答案：A

选择题

We _____ he be present at the meeting.[ ]

A. insist on

B. insisted

C. stuck

D. insisted on

填空题

稀释或配制准确浓度的标准溶液时，应采用（）或（）容量瓶。