【正文】
have Rewrite the following sentences with noun clauses as the subject. 1. His discovery has not yet been proved. 2. Do the other astronomers accept his ideas? It remains a question. What has not yet been proved is his discovery. Whether the other astronomers accept his ideas remains a question. 3. The first appearance of life on earth is still a mystery to scientists. 4. Why is the earth being warmer? It is an important topic for research. How life first appeared on earth is still a mystery to scientists. Why the earth is being warmer is an important topic for research. 5. Stephen Hawking at 65 experienced zero gravity during a flight. It amazed everybody. 6. Pluto is no longer considered a pla in our solar system. What a surprise! It amazed everybody that Stephen Hawking at 65 experienced zero gravity during a flight. It is a surprise that Pluto is no longer considered a pla in our solar system. 從 A、 B、 C、 D四個(gè)選項(xiàng)中,選出可 以填入空白處的最佳選項(xiàng)。 5. No matter who breaks the rule will be punished. 6. When and where the meeting will be held still remain a question. 引導(dǎo)讓步狀語從句時(shí)二者可互換,但引導(dǎo)名詞性從句時(shí)只能用 whoever。 2. If she’s ing or not doesn’t mat