Hangzhou is a famous city in China,          many people come to buy tea.

We will be shown around the city: schools, museums, and some other places, _____ other visitors seldom go.

I saw a boy in the supermarket yesterday,         reminded me of my good friend.

Vitamin D gets produced when animals are exposed to direct sunlight, for＿reason, it
is always advisable to give them chances to spend time in the sun.

Most of my friends shop at the stores _____ the goods are very cheap.

About 22.4 percent of all homes in urban areas were lying vacant in China in 2013, the vacancy rate was 1.8 percentage points higher than ________ of 2011 according to the survey.

Can you remember the amazing scene _______ the heroine finally became a butterfly?

—How do you find our campus?
—Impressive! I like the small lake best, around which _____ lines of tall trees.

The new CCTV Tower, ___________ shape is uniquely designed, is frequently visited by traveler.

This is the most serious and worst situation ________ I have ever experienced as a fan of the NBA.
A. which            B. when            
C. that             D. where