Ⅰ.单句语法填空
1．The biologist concentrated on observing(observe) the phenomenon.
2．The company released(release) information about the new mine in Australia.
3．This book is easily accessible(access) to the young reader.
4．I thanked her for her considerate(consider) choice for me.
5．Don't set him off talking politics(politic) or he'll go on all evening.
6．Have you any concrete thoughts on how to deal with this difficulty?
7．They argued him into the adoption(adopt) of the plan.
8．They said the allocation(allocate) of seats was unfair.
9．Fortunately，he broke away from these people years ago.
10．He could have passed(pass) the exam，but he was too careless.
