C
to give a broad view of the variety of occupations.
D
3.We insisted on giving the task and promised to fulfil it in time.
A B C D
答案参考:
1.D exist是一个不及物动词不能用被动语态,要把D项改为exists.
2.C designing to gjve a broad view of the variety of occupations整个这一句都是用来修饰lecture的,design在句意中不能与lecture够成动宾关系,很明显,design得是人作主语的,因此,改为designed.
3.B 不是我们give the task,而是被别人give the task,所以得用被动语态,改为being given.
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