At present there is a fierce debate over the question_______ human cloning should be allowed.
____ the rising birth rate and immigration, the declining death rate also ____ the population growth.
The __________ rate has been rising in the past decade in China,________ is reported in a recent survey. People find it hard to maintain their marriage.
Many young people in the West are expected to leave ______________ could be life’s most important decision — marriage — almost entirely up to luck.
Mr. Smith suggested the student ___ to be given a prize.
Nobody in our class but Tom and I ___ that our monitor is going abroad for further education.