derstandings ________ from lack of social communication, unless ________ properly, may lead to serious problems.

(2013·成都一诊)They ________ to go shopping in the downtown district, but they cancelled it because of a hard rain

Peter was so excited _____ he received an invitation from his friend to visit Chongqing.[ ]

For a fixed price of $6 you can have soup, a main meal with two vegetables and fruit[ ]

She ____ to her hometown several times