.It is uncertain whether the medicine will work on the this cold, _________?A. won't it B. isn't it C, will it D. is it
Since nobody gave him any help, he have done the research on his own.
No onebe more generous; he has a heart of gold.
—Why are your eyes so red? You _______ have slept well last night. —Yeah, I stayed up late writing a report.
21. The children lost in the woods; otherwise, they would have been at the lakeside camp as scheduled.
Harry is feeling uncomfortable. He _____ too much at the party last night.