Friends are those ___make you smile, always open their hearts to you and encourage you to succeed.

– My bike is missing. I can’t find it anywhere.– I’m afraid you have to buy        .

—Have you finished your work yet?—No，not yet. I think it’ll take ________ minutes. 

I am thirsty, Could you let me have _____ coke?

 --- “Why don’t you go to the Science Museum?”  ---“I hear there’s ______ in it.”