Having been ill in bed for nearly a month ,he had a hard time________ the exam.
—Why are you standing here? —I’m waiting for Shirley. She will be back _____.
By the year 2020 scientists _____ a lot of research on AIDS.
The former manager of the company was said _____ in an organized crime.
_____ is commonly believed that the play was written by Shakespeare.
I will buy this type of car _____ the price is brought down to under 10,000 dollars.