—Howlongisit

问题详情：

 —How long is it _______ you picked up your badminton training?

—It was not until my finance became better in last December _______ I started the training.

A. before; when                                               B. until; that

C. since; that                                                   D. that; when

【回答】

【解析】选C。第一空考查句型It is+一段时间+since+从句(使用一般过去时)；第二空考查强调句型，故此题选C。

知识点：连词

题型：选择题