Food shortage will long be a worldwide problem _______ much has been done to supply enough for everyone.
I wish I _______ play tennis with my brother this afternoon, but I have to study for a test.
As a teacher rich in experience, he knows how to _______ his ideas to these new students in a limited period of time.
His first book is of great use for our course. But his latest one is ______ worth reading.
In China, _______ pressure to pass _______ exams seems to cause lack of students’ creativity.
________ should any money be given to a small child.