阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。
The latest prototype(原型) of SpaceX’s next-generation Starship rocket launched successfully on Tuesday ___1___exploded on impact during an attempted landing after a development test flight.
Starship prototype Serial Number 9, or SN9, aimed ___2___(fly) as high as 10 kilometers, or about 32,800 feet altitude. The flight was similar to the one SpaceX conducted in December, when it launched prototype SN8 on the ___3___ (high)and longest flight to date.
While the rocket flew successfully, it hit the ground explosively on ___4___ (it) return, just as the SN8 flight did in December.
Although Starship SN9 suffered the same explosive fate(命运) as SN8 two months ago, SpaceX views the test flight ___5___ a step forward in the rocket’s development. SN10, likely the next to attempt a launch-and-landing, ___6.___ (be)already in place when SN9 took to the skies.
Despite SpaceX’s ___7___ (optimistic)about SN9′s flight test, the Federal Aviation Administration said in a statement ___8___ it is leading an “investigation of today’s landing accident.”
“Although this was an uncrewed test flight, the investigation___9___ (identify) the root cause of today’s accident and possible ___10___ (opportunity)to further enhance safety as the program develops,” the FAA said.
二、语法填空（高考标准）
1.but
2.to fly
3.highest
4.its
5.as
6.was
7.optimism
8.that
9.will identify
10.opportunities
The latest prototype(原型) of SpaceX’s next-generation Starship rocket launched successfully on Tuesday ___1___exploded on impact during an attempted landing after a development test flight.
Starship prototype Serial Number 9, or SN9, aimed ___2___(fly) as high as 10 kilometers, or about 32,800 feet altitude. The flight was similar to the one SpaceX conducted in December, when it launched prototype SN8 on the ___3___ (high)and longest flight to date.
While the rocket flew successfully, it hit the ground explosively on ___4___ (it) return, just as the SN8 flight did in December.
Although Starship SN9 suffered the same explosive fate(命运) as SN8 two months ago, SpaceX views the test flight ___5___ a step forward in the rocket’s development. SN10, likely the next to attempt a launch-and-landing, ___6.___ (be)already in place when SN9 took to the skies.
Despite SpaceX’s ___7___ (optimistic)about SN9′s flight test, the Federal Aviation Administration said in a statement ___8___ it is leading an “investigation of today’s landing accident.”
“Although this was an uncrewed test flight, the investigation___9___ (identify) the root cause of today’s accident and possible ___10___ (opportunity)to further enhance safety as the program develops,” the FAA said.
二、语法填空（高考标准）
1.but
2.to fly
3.highest
4.its
5.as
6.was
7.optimism
8.that
9.will identify
10.opportunities
