1.----How long do you think it will be____China sends a manned spaceship to the moon?
问题描述：
1.----How long do you think it will be____China sends a manned spaceship to the moon?
-------Perhaps 2or 3 years.
A.when B.until C.that D.before
答
选D,"你认为中国向月球发射人造飞船还会多长时间?"before可以意为'...才..."或“...就...”,此句有“才”的意思.（希望可以采纳）