She changed so much that I could hardly _____ her when we met again after a separation of 20 years. What’s more, she had just had her hair cut, and she was wearing new glasses.
By the middle of the 21st century, the vast majority of the world’s population _____ in cities rather than in the country.
--- I need to advertise for a roommate for next term. --- _____? Mary is interested.
A major earthquake _____ 8.0 on the Richter scale strongly _____ Wenchuan County in Sichuan Province at 2:28 p.m. on May 12, 2008.
It was in the small house _____ was built with stones by his father _____ he spent his childhood.
--- May I go and play with Dick this afternoon, Mum? --- No, you can’t go out _____ your work is being done.