The two countries were between 1989 and 1992.
| A．peace | B．at no war | C．at peace | D．at peaceful |
17. ________ the grandparents love the children, they are strict with them.
| A．While | B．As | C．Since | D．Because |
16. _______ the punishment was unjust, he accepted it without complaint.
| A．So long as | B．Even though | C．Since | D．While |
15. He is better than _______ I last visited him.
| A．when | B．that | C．how | D．which |
14. Why do you want a new job ____ you’ve got such a good one already?
| A．that | B．where | C．which | D．when |
13. Don’t play by the river _______ you fall in and drown!
| A．in case | B．so that | C．in order that | D．when |