I don’t think the experiment is ______ failure. At least we have gained ______ experience for future success.
#9214
A
/ ; the
B
a ; the
C
a ; /
D
/ ; /
推荐题目
 Mr Smith likes traveling _______ ,but his wife enjoy _______ . 
#8177
A
by train; taking a taxi
B
on train; by taxi
C
by train; by taxi
D
on train; taking a taxi