There was no news；＿＿＿＿, she did not give up hope. 

 ----Volunteering is becoming ______ popular in China. ---- Yeah. People are now aware that helping others is helping themselves.

Save water as ___ as we can.

—Do you often visit your friends?—________，because we are all busy with our jobs.

 Nature reserves are very important for preserving many animals and plants, which would _______ run the risk of becoming extinct.