Your handwriting is all right, _______, you can do it better in my opinion

______ your brother a member of the basketball team—–No, he ______ like playing basketball.

许多同学都有自己的电子邮箱，如168@sina.com, pgbook@ 163.com, hifriend998 @ 126.com 等。请问其中的@表示什么意思，该怎么读

Sir, you ______use your mobile phone at the gas station. It’s very dangerous.

His being late for the performance __________ a complete failure