单选题：After months of voyage, Columbus arrived in_____ later prove..

If you are traveling_______the customs are really foreign to your own, please do as the Romans do. A．in whichB．what C．whenD．where

We hope that the measures to control the stock market, ____ are taken by the government, will work.A．thatB．whereC．whichD．what

I’ll never forget the moment _____I first met Mary and _____ makes me already feel happy.A．that; thatB．which; whatC．at which; whichD．when; what

He spoke proudly of his part in the game, without mentioning ________ his teammates had done. A．whatB．whichC．whyD．while

You can depend on whatever promise _______ he makes. A．/ B．why C．when D．whose