—What has made him upset recently?—________ alone to face the troublesome case.
Ladies and gentlemen, due to an unexpected accident, one of the singers whom all of you ____ to hear ____ tonight.
“What you want, you ____ have it on condition that you get the best result,” said the boss.
Take an active part in sports or other activities you enjoy ____ you can meet various kinds of people.
It is well-known that ____ year 2006 saw many developments in ____ science and technology, with those in the field of space science being particularly notable.
A writer has to ____ his imagination and experience to produce good works.