Take the weight off your feet:

寫下腳上的重量 ×

歇歇腳 √

例句：

We've been shopping all day, let's take the weight off our feet, sit down and have a cup of coffee. 

我們逛了一天了，讓我們歇歇腳吧，坐下來喝杯咖啡。

You've sold it to me:

賣東西給我 ×

我完全信你 √

例句：

OK, you've sold it to me. I can't wait to have a trip.

好的，我完全信你，我迫不及待去旅游。

To lie through your teeth:

用牙齒說謊 ×

睜眼說瞎話 √

例句：

The witness was clearly lying through his teeth.

那證人分明是在睜著眼睛說瞎話。