3、He cheats at cards.(他玩牌時作弊。)

4、I was good at sums at school.(我上學時擅長算術。)

5、She's great at chess.(她國際象棋下得很好。)

1.Medical care is still free at the point of use.

醫療保健在實際提供點仍然是免費的。

2.People tend to work hard at this stage of life.

人在這個人生階段往往發奮努力。

3.We do not have any more information at the present time.

目前我們沒有進一步的消息。

4.It'll take a year, at the very least.

這至少需要一年時間。