They ________ for two years and haven't been in touch with each other for a long time.
Tom kept silent about the accident _________ lose his job.
Iraq has ______ too many wars since 1990, making his people _______ a lot.
As is known to all, China _______the group of developing countries.
We find _______ difficult to talk to him about anything serious.
—Thank you for joining in our conversation tonight. —_____.