2019年mpacc考试英语真题——连词588

{01}    everybody enjoys fresh cut flowers around his house．few people know how to keep them for as long as possible．

A.Because

B.Since

C.While

D.If

解析：while引导让步状语从句，表示“虽然”之意。
本题选C。
{02}He was told that it would be at least three months ___ he could recover and return to work.

A.when

B.before

C.since

D.that

解析：before引导时间状语从句，意为“在……之前”，表示他康复重返工作还至少三个月时间。when引导时间状语从句，意为“当……的时候”。since引导时间状语从句，意为“自从”，表示从某个时候一直延续到现在，常与现在完成时连用。that用于名词性从句或定语从句。
本题选B。