– Have you ever been to the city before?– No. This is the first time I _____ here.
#101209
A
was
B
have been
C
come
D
am coming
推荐题目
A library with five thousand books ____________ to the nation as a gift.
#102535
A
have offered
B
are offered
C
has offered
D
is offered
--- I ____ so busily recently that I ____ no time to help you with your maths.---That’s OK. I can manage it by myself. 
#100194
A
had been working; had had
B
have been working; had
C
have been working; have
D
am working; will have
Since the opening and reform policy, China    a boom in its economy.
#102286
A
enjoys
B
has been enjoying
C
enjoyed
D
having enjoyed