What's this in the box ( ) a puppet.)里应该填It's There's 还是This

What's this in the box ( ) a puppet.)里应该填It's There's 还是This Look at this. It’s a pencil box. It’s orange. What’s in it? There's nothing in this box.Look,it's e----- what’s this?It’s……horse.横线上填a还是the 填a还是an What's this?It's_______apple. there's,the,a,what's,calculator,box,in,in,it(?.)连词成句 there's.the,a.what's,calculator,box,in,in,it(?.] There's nothing in this box What's this?It's a box.为什么回答中要用It's,而不用this is a box What’s in the box? ----_________. A. It’s a shirt B. There i what's this in English?It's _ MP4.中间应该填什么啊 What's in the box It's a cat.(改错)