With the help of high technology, more and more new substances ______ in the past 10 years.
It is _______ he often fails in exams ______ makes his parents worried about him.
Ripe apples________, as an experienced farmer once told.
Someone ______ up your seat to the lady with a baby, please.
---So you think we should sell the house and move to the country. ---_______. We badly need the fresh air there.
He’s looking for a new job, one _____ he can get more money to support his family.