So many natural disasters are believed___________over the recent years because of the frequent unreasonable mankind activities.
A.to have come about | B.to come about |
C.coming about | D.to be coming about |
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So many natural disasters are believed___________over the recent years because of the frequent unreasonable mankind activities.
A.to have come about | B.to come about |
C.coming about | D.to be coming about |