I think acar less time thantaking a bus.

. Scientists have to work hard to keep_____ with modern discoveries and developments.

“When my husband died five years ago，__________ was difficult to go from ‘we’ to ‘me’，”said Joe Kita to us.

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

want you to ______ each sum of the money you spent.[ ]