A．some timeB．sometimeC．sometimesD．some timesIt has been……

单项选择题Mr. Green works in a （） building.

A．thirty stories high
B．thirty - stories high
C．thirty - story - high
D．thirty - story high

单项选择题I don’t think the poor ______ always poor. Working hard ______ very important.

单项选择题—Would you mind （） the window.

A．I closing
B．my closing
C．me closing
D．me close

单项选择题Those robots can walk like ______.