There were calls for major changes to the welfare system.

　　有人要求對福利制度進行重大改革。

　　Call me if you have any problems regarding your work.

　　你如果還有什么工作方面的問題就給我打電話。

　　The result is going to be too close to call.

　　雙方實力非常接近，因此結果無法預料。

　　Every single time he calls, I'm out.

　　他每次打電話來我都不在家。

　　It's been two weeks now since she called.

　　她到現在已經有兩個星期沒來電話了。