It was only after he had read the papers Mr. Gross realized the task Before him was extremely difficult to complete.
Who will be ___________ the company when the manager (经理) is out?
________ is a very popular sport in summer.
John failed in the exam, ________he had prepared a lot for it before.
—______ have you studied English?—For six years.
Nuclear radiation is said __________ the biggest health challenge in Japanese Earthquake over the past few months.