1) Studying abroad seems difficult but interesting to many students.
CHALLENGING
Students understand how challenging it is.(to study abroad)
2) Studying abroad is similar to studying at one's home college.
DIFFERENT
Studying abroad is not different from studying at home.
3) When you are abroad you can miss your relatives very much/
DEPRESSED
While abroad you feel (are) depressed because you can't see parents and relatives.
4) You are in charge of all your things.
RESPONSIBLE
You are responsible for everything.
5) You can learn a lot about yourself and the world while studying abroad.
BEST
Studying abroad is the best experience you can have
11. We are sure that we will learn the news in the evening.
12. By the time children return from school their mother will have been working in the garden for several hours.
9.1. The sun has sat. It 'll get dark soon.
2. Paul has learnt a lot of English since he came here.
3. He had been waiting in the rain till it got dark but she didn't come.
4.Ted said that his father's opinion has always been important to him.
5. George will meet me at the airport when my plane lands tomorrow.
10. 1) ”I am your second cousin, and your father is my uncle, “Mary explained.”I hear you are ill.
2) Does our father often come and see you? - Not often.
3) He not does not like seeing me because it makes him remember my mother.
3) She died when I was born, so he almost hates me, I think.