问题补充:
Is necessary to complete the design before National Day?
A. this
B. that
C. it
D. he
答案:
A. this
B. that
(答案→)C. it
D. he
解析: it作形式主语,代指后面的不定式。
时间:2019-02-12 09:41:23
Is necessary to complete the design before National Day?
A. this
B. that
C. it
D. he
A. this
B. that
(答案→)C. it
D. he
解析: it作形式主语,代指后面的不定式。