This photo reminds me the days when I worked the farm with my friends.

John looks a bit upset.Did you tell himthe bad news—Yes，but I________him after his birthday party.

I’ve just heard that the lecture (讲座)to be given by Ma Yun,the Alibaba CEO,has been cancelled(取消).—-Oh , no!__________ .

I found _____ necessary to save energy and protect the environment.

It seemed only several minutes _______ hefinished this painting .