I take part in a group discussion or try to speak English to someone, I find it difficul

I take part in a group discussion or try to speak English to someone, I find it difficult to express myself.
A. If only
B. Every time
C. Now that
D. In case

A. If only(答案→)B. Every timeC. Now thatD. In case解析：考查every time引导时间状语从句。句意：每次我参加小组讨论并尽力想和某人讲英语时，我发现我难以启口。If only只要，every time每次；now that既然；in case万一。高考中考查状语从句时往往几种形式的状语从句一起考查，做题时应注意牢记连词的含义并正确判断主从句之间的关系。复习的过程中要特别注意这类名词词组用作连词的用法,很有可能在单选中的词义辨析题中出现,也可能在完成句子中出现,复习时要熟记其基本用法及常用词组。含有time的名词词组用作连词:(1)the first time相当于一个连词,后加从句,意为“第一次……时”(2)the next time下一次(3)the last time上一次(4)the moment/second/minute一……就……。故B正确。

就是这个解释