Nobody knows ____.A .what wrong is.B .when did he come back.C .if Kyle will play the solo.
In the future, robots will ______ help people do many things, such as washing and cooking.
Is it cheap ______ from Qingdao to Beijing by train?
What will the weather ______ the day after tomorrow?
---Can your uncle play basketball? ---Yes, he can play ______ basketball ______ football. He is good at sports.
---______ a small plane in the future? ---Yes, I think so.