．Walking together, my father and I used to have a lot of conversations I __________learned lessons from his experience.

Look! So many colorful bicycles in two lines over there.—They’re for public. This kind of green smart traffic is ______ in big cities now.

Yunnan ______from serious drought since 2009, so it’s our duty to save water every day

News reports say peace talks between thetwo counties have________ with no agreement reached

.It rained heavily in the south. _______serious flooding in several provinces.