_____several times，but unfortunately，the boy still couldn’t smooth away the problem on his own.
#73673
A
Having been explained
B
The problem having been explained
C
The problem had been explained
D
Although the problem had been explained
推荐题目
Now the question that you must carefully consider is _____ can be put into practice.
#68847
A
how what you have learned
B
how you have learned
C
that why you have learned
D
how that you have learned
After gaining my Ph D，_____________________.
#67890
A
the diploma will qualify me for the job of working in the university
B
it is likely for me to be employed by the university
C
I will be employed by the university
D
the university will employ me
Europe has achieved more in controlling the AIDS virus than Asia in the past ten years, _______the number people infected with the virus is going up sharply.
#72269
A
when
B
that
C
which
D
where
I have kept that photo ______ I can see it every day, as it always reminds me of the happy days in New York.
#67902
A
which
B
where
C
whether
D
when