What preparation work should we do befor...o meet the guest(s)?

Remember to close the windows befor you___(leave)

befor/against（赞成/反对）可以加从句吗?

Befor the middle of the 20th century, Beijing’s early-fifteenth-century layout was still untouched by modernity or war.

According to British law, the accused is () befor proven guilty A: innocent B: guilty C: suspected D: sentenced

表示赞成的（befor/beinfavourof/agree……）那些可以加从句,表反对的呢?

We need to fininsh makingif we want to befor our trip tomorrow. A: prepare; preparations B: preparations; prepared C: prepared; preparations

Which of the following call be inferred from the passage about cotton production in the United States after the introduction of Whitney's cotton gin（） A: More cotton came from sea island cotton plants than befor B: More cotton came from short-staple cotton plants than befor C: Most cotton produced was sold domesticall D: Most cotton produced was exported to Englan

since之前加ever，除了强调没有其他意思。常见的表达有：ever since,ever befor,ever after, ever afterwards等。

As soon as he had got into the car, I said good morning. I said good morning ______ he had got into the car. A: befor B: a long time after C: just afte D: a moment before