4. Some students find certain grammar points and structures very difficult; , teachers need a reliable source of practice material to get these points across effectively.
A. however B. as a result
C. even so D. what's more
4. B解析：as a result意為“因此”。句 .意:有些學生覺得某些語法點和結構很難，因此，老師們需要一種可靠的練習材 料的來源來使得這些內容有效地被學生 們理解。
題目來源：2016年周測月考直通高考高中英語必修4外研版 > 周內課時練7 Period 3 Function,Listening and Speaking, Vocabulary, Pronunciation,
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9. From her smiling face we can see she is in a good today.
A. expression B. mood
C. spirit D. situation
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6. Mary, here—everybody else,stay where you are.
A. come B. comes
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4. We can infer from the text that.
A. cities in developed countries suffer less traffic problems
B. London was planned and built before cars
C. drivers can pay the charge at any time
D. the congestion charge will be reduced soon
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