---I’m sorry I broke the vase. ---0h.______.It wasn’t very expensive.
Silk from China found its way to India, the Middle East and Rome, _______ spices and glass, which was not known to China.
Li Yang, the founder of Crazy English, says that he copies it down _______ he comes to a sentence.
This is the third time I _______ Beijing. The second time I ______ here was on Christmas Day last year.
Computers can do a lot of things nowadays, but _____ more still need to be done by man.
Lectures were _____ so students could be more focused on their study for the finals.