I．单项选择题。（每题1.5分，共10题，共计15分。）
1. Mr. White survived his wife _____ 9 years.
A. by B. for C. with D. from
2. I don’t doubt ______ he can finish the task on time.
A. whether B. if C. that D. what
3. We are _________ an experienced and reliable producer of jewellery.
A. search for B. in search of C. in our search of D. searched
