. Knowledge of English is a must in international trade.
He is rather difficult to make friends with, but the friendship of his, _____, is truer than any other.
It made many countries angry ______ the NATO, without the permission from the UN, started a war in Yugoslavia because of the problem of Kosovo.
It wasn’t such a good dinner _____ she had promised us.
The time is not far away _____ modern communication will become widespread in China’s vast countryside.
I have never been to Beijing, but it is the place _____.