问题
选择题
It is said that some software on learning subjects for pupils _______ in a very practical way. [ ]
A. designed
B. is designed
C. designs
D. is designing
答案
答案：B
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It is said that some software on learning subjects for pupils _______ in a very practical way. [ ]
A. designed
B. is designed
C. designs
D. is designing
答案：B