Various efforts over the centuries _____
题型:选择题
问题:
Various efforts over the centuries _________ to predict earthquakes to reduce the damage.
A.are being made
B.have been made
C.were made
D.were being made
Various efforts over the centuries _________ to predict earthquakes to reduce the damage.
A.are being made
B.have been made
C.were made
D.were being made