________ seems to be a strong competition in China for senior high students to enter college or university.
I wasn't sure if he was really interested or if he ______ polite.
The manager is said to have arrived back from Paris where he ______ some Europeanbusiness partners.
After Jack had sent some e-mails, he______ working on his project. (2012 .山东)
Is honesty the best policy? We ______that it is when we are little.
Only ________ can you hope to make improvement in the operating system.