Although ____ my opinion, the old professor didn’t come up with his own.

The attempt and insistence on purchasing the Diaoyu Islands by Japan will ______ harm    China-Japan ties．

As he works in a remote area, he visits his parents only__________.

My parents lent me the money. ________, I couldn’t have afforded the trip.   

The test not only helps make our _____ acquired knowledge permanent, but also enables us to find out what needs to take more time to improve.