根据首字母提示补全单词，使对话恢复完整。1. A: W___________ does the rain come from?
B: It comes f___________ the clouds.
2. A: Where does the cloud c___________ from?
B: It comes from the v___________.
3. A: W___________ are you going to do tomorrow?
B: I'm going to p___________ a flower.
A: H___________ do you do that?
B: First, put a flower seed in the s___________.
A: What should you do t___________?
B: W___________ it. Put it u___________ the sun every day. Then you c___________ see
a flower s___________.1. What; from 2. come; vapour 3. What; plant; How; soil; then; Water; under; can; sprout