What makes online shopping so popular is      it shortens the distance between manufacturers and consumers．

It was last Saturday ________ we visited the History Museum.

------Mr Tito’s journey was certainly unusual!
------_____ he chose, and the price of his trip.

His family members gave some examples of_____ his drinking and smoking had affected the family.

(2012·浙江高考)Had they known what was coming next, they ________ second thoughts.

It was not until near the end of the letter      she mentioned her own plan.

________ these experiments were successfully completed would we think of going into humans.

I'm sure you'd rather she went to school by bus，       ？

.________, I have never seen anyone who’s as capable as John.

If it _______ next week , the crops would be saved.