来自谭文彬的问题
Therewillbelesspollutionmorepeopleusepublictransportation.()A.butB.thoughC.unlessD.if
There will be less pollution more people use public transportation.()
A.but
B.though
C.unless
D.if


Therewillbelesspollutionmorepeopleusepublictransportation.()A.butB.thoughC.unlessD.if
There will be less pollution more people use public transportation.()
A.but
B.though
C.unless
D.if
答案:D.but除了;though尽管;unless除非;if如果.根据more people use public transportation,可知如果更多的人使用公共交通工具的话将会使污染更少一些,如果更多的人使用公共交通工具是减少污染的条件.if引导条件状语从句.故选D.