"The space shuttles is the subject."
Simple formula: find the verb of the sentence then ask the question "who or what performs the verb" and the answer to that question is the SUBJECT of that sentence!
In your sentence; ask the question;
"Who or what have made travel to the International space station convenient and possible?
Answer: The space shuttles (that's your subject)
Answer:
I wish I could visit my friends, I miss them a lot and feel lonly
On TV, people who sleepwalk generally act like zombies, they stagger along with their arms held stiffly in front of them. In fact (as you know if you've ever seen one), most sleepwalkers walk around quite frequently. They may even perform routine tasks. Such as getting dressed or brushing their teeth. Sometimes they talk, although their conversation may not make a lot of sense. "Sleepwalking is relatively typical behavior. Especially among children. It occurs during periods of profound sleep.
In most cases, a person sleepwalks a few times, and then the sleepwalking stops forever. If sleepwalking becomes a frequent problem, the sleepwalker may need a doctor help. What should you do if you see someone sleepwalking? Leading the sleepwalker back bed is usually all that is necessary. But if the sleepwalker is in danger of injury, gently wake him up or her up.
