问题补充:
Professor Smith will come here to give a speech. All the preparations must be before 5 o’clock.
A. in time
B. in sight
C. in place
D. in control
答案:
A. in time
B. in sight
(答案→)C. in place
D. in control
解析: A及时,迟早;B在视野之内;C在合适的地方;适合;准备就绪;D在控制中;句义:斯密斯教授将要来这里做一个演讲,在5点之前所有的准备工作都要准备就绪。根据句义说明C正确。