______ you ought to do is to see a doctor.
A. How
B. What
C. Which
D. That
Neither Mary nor her sister______to the party.
A. go
B. are going
C. have gone
D. is going
Generally speaking, nodding your head is______ to saying yes.
A. contrary
B. equivalent
C. secondary
D. relevant
某桥梁工程项目有四个可能的建桥位置,其现金流量如下表,基准收益率为10%,则()为最佳桥位。
A桥位
B桥位
C桥位
D桥位