Tom is good at his work, but he seems to _____ confidence.A lack B lack of C lacking in D short of
It is thought that meteories (陨星)may hold clues about the ________of life on Earth .
He is having a family party in ________of his 84th birthday .
It is important to know about the cultural differences that________cause problems.
When Premier Zhou Enlai was alive,he________work from morning until night every day,dealing with numerous affairs.
—May I tell this to my close friend? —No,you________.Never let anybody else know about it.