Before the first nonstop flight made in 1949,it______necessary for all planes to land for refueling.
#104556
A
would be
B
has been
C
had been
D
would have been
推荐题目
Hurry! The train ______.You know it_________at 8:30 am.
#102415
A
leaves ; leaves
B
is leaving ; leaves
C
leaves; is leaving
D
is leaving; is leaving
The tourism of Linyi_______ a rapid growth over the last decade. Now it's 2nd most visited city in Shandong Province.
#99656
A
saw
B
had seen
C
is seeing
D
has seen
In the last few years thousands of films __________ all over the world.
#102095
A
have produced
B
have been produced
C
are producing
D
are being produced
We ______very early so we packed the night before.
#100262
A
leave
B
had left
C
were leaving
D
have left
We first met on a train in 2000. We both felt immediately that we___each other for years.
#101191
A
knew
B
have known
C
had known
D
hope