Evenwiththenewdevelopmentinresearch,onlyatiny________ofalltestsaredonewithoutusinganimals.
A、varietyD
本句的意思是:“即使研究有了新的发展, 只有一小部分的试验可以不用动物” 。因此答案为 D。variety 和 plenty 分别表示“多样”和“大量的”,意思不合适。 amount 后只能接不可数名词,而 test 是可数名词。
WeshallcancelthecontractifyoufailtoopentherelativeL/C____theendofthisyear.
Sincethepremiumvarieswiththescopeof____extrapremiumisforbuyer'saccount,shouldadditionalsiskecovered?()
Willyousendus_____returnmailpamphletsandpricelist____yourexports?
Evenwiththenewdevelopmentinresearch,onlyatiny________ofalltestsaredonewithoutusinganimals.
Byjointeffortswecan___bothfriendshipandbusiness.()