A both of which B both of them
請問什麽情況下用which,什麽情況下用them呢？
答：引導非限制性定語從句時用which, 如果是並列分句，或者是分詞短語的邏輯上的主語，用them
本題為現在分詞using many idioms的邏輯主語，合在壹起叫獨立主格結構。
2.If we interfere with nature,we’ll have to deal with a series of problems and the consequences ___ will create in return.
A they B it
請問為什麽不能選A 前面不是復數概念嗎
答：做題首先要理解句子的意思，知道這個題句說的是什麽，不能只憑片言只語。
譯：如果我們幹涉大自然的話，我們將不得不應付壹系列的問題和那些後果。（這些問題和後果是[它--指大自然] 反過來（作為回報in return) 將會為人類創造出來的
本題句不僅是妳有打錯，還有出題者的問題。如果是壹系列的問題和後果，則and後這個the不需要。in turn是輪流，顯然是in return之筆誤。
本題句由下句改編而來，網上還沒見到過：
高三壹輪復習教案 Unit3 Science versus Nature（牛津譯林版必修5...
If we interfere with nature we will have to deal with the consequences .Who knows what could happen We could produce a monster .
3.It was only after the 1990s some progress in the use and development of telecommunication technology was made.
A when b that
請問這個不是強調句嗎？為什麽不選B呢
答：再次提醒妳：題目要抄全！
50. —When did many people begin to realize the importance and possibilities of zero distance between people?
—It was only after the 1990s_______ some progress in the use and development of telecommunication technology was made .
A. that B. when C. where D. which
又是壹人工考題+陷阱題。
問妳When,直接回答after the 1990s不就行了嗎？
the 1990s是不需要限制性定語從句的！
這就是常見的“帶定語從句的省略了的強調句型"!
如人問：Where did you meet YM?
答：It was in the hotel _ where_ I was staying the other day (that I met him).
非常感謝樓主，請問以後有問題都可以向妳請教嗎？妳的解釋很清楚，對我很有幫助。
答：妳是樓主，我是樓仆。當然可以。
妳的問題很有意思。我很願意回答。
只是不要壹次太多，最好壹貼壹題。不要打錯題目，不要漏了選項。最好有自己的疑惑。
下班了。