The U.S. President Barack Obama arrived in China’s economic center Shanghai on Sunday nightof November 15th 2009, ______a state visit to China.[ ]

Tom is experienced in driving than Jack. — ,neither passed the test.

Tony can’t have received the invitation ________, he would have attended your birthday party yesterday

One of the glorious moments in my school life was I was awarded the Mayor’s Award

That was the reason______ Mac gave me the other day.[ ]