The speed ___ on this highway is 80 kilometers per hour.
A. mechnanize
B. combine
C. determining
D. restriction
查看答案
They ____ their efforts to a common end.
A. mechnanize
B. combined
C. determining
D. restriction
I couldn’t rely __ John for information
Engineers are __ high demand in this area.
a small mistake can lead __ serious consequences.