29. — When is he willing to lend his friends some money?— Only when ______ hard enough.
Our job is with _______ hours: one can work in the morning or in the afternoon, so long as work for no less than five hours every day.
There is one issue that stands out above all the rest, one every student is concerned about, _______ which class he may be from.
The pop star was asked many personal issues, surrounded by crowds of fans, so that his patience _______.
Only when our project has been approved of by the committee ______ to carry it out.
We are lucky to be among the generation of people who have ______ and experienced the great social changes in our country.