There ____ a set of keys in the Lost and Found case.
With the help of the smart phones, you ____ video chat with your friends on the phone.
— Sam, you don’t work hard at geography.— My dad says that the world is changing every day, I decide to wait until it stops.
— How much of his speech do you think you have understood?— . I wish I had worked harder.
Not everyone knew about the Hong Kong singer Deng Ziqi, some even thought she was nobody, but she____________ to be a great singer and won a lot of fans.
I listened to Professor Chen-Ning Franklin Yang’s lecture about his study and physics, but I failed to get its key ______ .