高一英语适当时态填空,

题目

高一英语适当时态填空,
By the end of July,1969,the American government（ ）(pay) over $5 billion on the space programme.Humankind （ ）(not,have) any other greater project than Project Apollo.
Landing on the moon requires a lot of time and effort.Scientists and engines( )(work) hard since they began to design the spaceship.They made five sets of plans for the Moon landing.They had intend to send a spaceship weighing 150000 pounds directly to the moon.
But the meant humans( )(land)on the moon many years later.Americans( )(not,spend)much more money and wait for years to build a huge rocket.They( )(send) five parts of a spaceship into space wieh five smaller rockets.Engineers on the ground ( )(have) the five separate parts "meet" in space.But there ( )(be)serious problems if the five parts failed to come together at the same time.At last,NASA decided to adopt a plan suggest by an engineer named Eagle( )(separate)from Apollo and land on the Moon.
Apollo( )(leave)for the Moon soon.And an exciting day( )(be about to,come)

答案

paid,hadn't,worked,landing,couldn't spend,sent,had,were,separating,left,was about to come