You have to be accurate in this job，because a small mistake can make a big ________.

Here is my phone number. You ______ call me anytime you like.

Why didn’t you try your best to get on the subway- I tried to, but it started moving_______ I could get on it.

How did he finish the work–I hear that he did it _______.

Liu Xuan, did you see the Denmark’s famed “Little Mermaid” sculpture in Shanghai Expo?—No, I didn’tI _______ it twice in Denmark