不好意思 因考试在即 有好几题问题请教
1 _____ too expensive, the fertilizer will not be bought by farmers.
a) If b) Since C) Because D) Although
答案是 a)If 我选对 但我不懂 为什么不是
If being too expensive,
2. Researchers are asking just _____ the futures of teenagers are changed
when so many of them are spending an hour or two on Internet each day, ...
a) how b) what
答案 how
若 changed 后面有to 是否答案就是what
what the futures of teenagers are changed to

1. 只用If 整句就足以表达意思的话 何须多添一词?2. into会好一点 但要用what的话 changed改成becoming应该会更自然一点