various
Peter has gone to Beijing, but I’m wondering why he ________ in such a hurry.
—My family usually holds a big party for my birthday, but I want to try a different way this year. —________
Only when________ possible to settle the problem.
They are still very cautious about ______ side effect the new medicine will bring about, although the experts have tried it on about 2,000 patients.
In the job interviews, job applicants often find themselves ________ unexpected questions, some very difficult to answer.