So difficult_____it to acquire a large vocabulary without the help of a teacher that he was close to giving up .
#84045
A
he have felt
B
have he felt
C
he did feel
D
did he feel
推荐题目
Only when they were put in prison and lost freedom(自由) _________ its importance.
#81127
A
they realized
B
did they realize
C
realized they
D
had they realized
—Did you enjoy reading that novel?—Yes, _______such an interesting novel.
#84166
A
never I have read
B
never have I read
C
ever I have read
D
ever have I read
It was announced that only when the fire was under control __________to return to their homes.
#82224
A
the residents would be permitted
B
had the residents been permitted
C
would the residents be permitted
D
the residents had been permitted
_______, the disease will produce a kind of poison that will kill the patient.
#82549
A
If it untreated
B
If is untreated
C
If being untreated
D
If untreated