2019年mpacc考试英语真题——连词589

{01}My parents were quarrelling about me ____ I could not quite tell why．

A.since

B.though

C.if

D.until

解析：though引导让步状语从句，意为“虽然”，表示虽然不知道父母为什么为自己而争吵。since引导原因状语从句或时间状语从句，意为“因为”或“自从”。if引导条件状语从句，意为“如果”。until引导时间状语从句，意为“一直”。
本题选B。
{02}____the plan has been made, let’s get down to ____it out.

A.Now that...carry

B.Because...carry

C.Since...carrying

D.Now...putting

解析：get down to doing sth. to为介词，开始认真做某事
本题选C。