What is the definite article for these words

Sarah menelangkupkan sebuah bikar kosong ke dalam sebuah besen berisi air. sarah mendapati bahawa air tidak dapat memasuki bikar sepenuhnya. apakah kesimpulan yang dapat dibuat daripada pemerhatian sarah?

Mi hermano espera que el tren a tiempo. a. llegas b. llega c. llegue d. llegues

You have been chosen to be the guide of an exchange student from costa rica. before the student arrives in the us, he has asked you to give him some tips about schools in our country. using 10 different commands, create a presentation in which you give him tips for being successful in us schools. your presentation should include 5 affirmative and 5 negative commands in the tú form. examples: study many hours, don’t sleep in class, etc. to create your presentation, you may use powerpoint, or one of the tools listed in the web 2.0 tools area (contact your instructor if you need ).