John waited at the bus-stop for nearly half an hour _____ the bus finally arrived .
#80108
A
when
B
as
C
before
D
while
推荐题目
The Frenchman speaks ______.
#80381
A
French as well as Chinese
B
Chinese as well as French language
C
Chinese as well as French
D
the French language as well as Chinese.
One’s life has value _____ one brings value to the life of others.
#30900
A
so that
B
no matter how
C
as long as
D
except that