When I try to understand _______ that prevents so many Americans from being as happy as one might expect, it seems to me that there are two causes.
#85435
A
why it does
B
what it does
C
what it is
D
why it is
推荐题目
—I’d like a pen which _________ well.—Will this one _________?
#85490
A
writes; do
B
writes; work
C
is written; do
D
is written;work
– What did he want to know, Jack?- ________ that we would have the picnic on Sunday.
#85289
A
what it was
B
when it was
C
whether it was
D
where it was