七年级20道英汉互译,30道词性转换,10道句型转换

14.This is an orange.(改为复数句)
____ ____ oranges.
15.Are you from China?(作肯定回答)
____,I ____.
16.Those are books (改成单数
____ ____ a book.
17.These are desks in English.(对画线部分提问)
____ ____ these in English?
18.He is in Grade Seven.(改为一般疑问句)
____ ____ in Grade Seven?

天空 the sky

只补充空缺部分！
these are
Yes,am
this is
Are desks
Is he