Mother was sitting near the window that was shattered by the heavy winds.
Kim and Jane were discussing the play that they both had seen.
The poem that Peg wrote for me was good enough to print.
Index cards will improve a presentation because index cards are note cards saying information that you need to or will speak or remember because when you go to present you won't get tongue tied and say the wrong thing at the wrong time and you won't get information wrong because you will know what to say using the Index Cards
Either would work, so c. either could be used.
Answer:
The standard plural form is spacecraft; spacecrafts is far less common.
Hope this helps..
