29. Please read the passage excerpt below:

 "Early reports suggested that the UN policy would reduce greenhouse gas emissions, yet subsequent studies revealed that its effects were negligible.      To this, researchers argued that without stricter enforcement, the policy could not achieve its intended impact.     "

Question: The primary purpose of the underlined sentence is to:
(A) provide an example that supports the claim in the first sentence
(B) introduce a counterargument to the claim in the first sentence
(C) explain the background of the policy discussed in the first sentence
(D) summarize the overall conclusion of the studies

答案:登入後查看
統計: 尚無統計資料