Rain comes from clouds.(對劃線部分提問）
Where-----does--rain come from?
另外還有：
I can see two desks in the picture.(對劃線部分提問）
--What----- can -------- you see in the picture?
Can you piant fiowers?(作否定回答）
---No----,I can't----------.
He meets many other littie water drops.(改為一般疑問句）
-----Does--- he ---meet------ many other little water drops?
（N）we have some seeds.(改為否定句）
We --don't----- ---have---- ---any----- seeds.