Chinatown has been the center of San Francisco’s Chinese community since the 1850s.Its boundaries have expanded significantly since the 1960s, and the neighborhoods built there are generally wealthy.

[单选题]Liberia has been in difficulty since its independence mainly because_______

[单选题]It’s the first time that he has been to Australia, ?A． isn’t he B. hasn’t he C. isn’t it D. hasn’t it

[试题]It’s the first time that he has been to Austrulia, ? A isn’t he B hasn’t he C isn’t it D hasn’t it

[单选题]D．B．rian arrived at the San Francisco airport two hours before the flight to Paris. He was wearing three shirts, a jacket, two pairs of socks, a pair of shorts, and two pairs of jeans. He was carrying one small backpack, which was very full, but he d

[主观题]center has been built in their place. The market at the corner of 83. _________

[单选题]If it has been over 12 hours since you missed a dose, you should .A． change the amount of your next doseB．, eat more when taking your next doseC． have a dose as soon as you rememberD． take the next dose at your regular time

[主观题]Wood has been used to make paper since the 19th __________(世纪).

[单选题]The central government has been working hard to keep China’s economy _____.

[问答题]She has been a lawyer since she finished college.

[单选题]The patient’s condition has deterioratedsince last night.A.Berea College.B.