A. had started B. has started C. started D. starts

A. changed B. has changed C. had changed D. is changing

A. reasoned B. would have reasoned C. was reasoning D. had reasoned

(1) It is very easy for employees to think of good ideas, but it is often difficult to have someone  those ideas. (2) Because we were enjoying the cool evening breeze and because we were listening to the sounds of nature, we  time. (3) Warm temperate conditions  South Africa, making it a popular destination for sunshine-seekers. (4) Mr. Wang wants to  by visiting relatives in Taiwan and looking into a business possibility. (5) I then realized that I would have to  the noodles sold for ¥50 at the stands in the stations where the train was making stop-overs. (6) He kept his hands under control and  making eye contact with his listeners. (7) Vacation days eventually became empty and boring, so I began to  September to roll around and for school to begin. (8) In the past dozen years, most astronomers have come around to operating  there was indeed a big bang. (9) For all of these reasons, we are placing emphasis on primary health care as  strengthening health systems. (10) Join their journey as they  and face death to climb 29,000 feet of wind-blasted rock and ice.

A. were B. was C. is D. are