D
本句的意思是：“即使研究有了新的發展，只有一小部分的試驗可以不用動物”。因此答案為D。variety和plenty分別表示“多樣”和“大量的”，意思不合適。amount后只能接不可數名詞，而test是可數名詞。
There was so much noise that the speaker couldn ’t make himself ________.
翻譯：fyoumakeusanofferatcompetitivepriceswecansellalargequantityofchemicalproductinourdistrict.
He has deep love for the people and ________ loyalty to the country.
Sincethepremiumvarieswiththescopeof____extrapremiumisforbuyer'saccount,shouldadditionalsiskecovered?()
In the Grammar-Translation Method, understanding and memorization of_____________were regarded as important means of developing mentality.
