1.I don't mean that it can't be solved,____I agree that ther

1.I don't mean that it can't be solved,____I agree that there are still some problems.
A.if B.so C.though D.since
2.Since June 1st,2008plastic shopping bags____no longer free at the supermarkets.
A.were B.would be C.had been D.have been
3."Is that bridge the world"s longest sea bridge?"Cathy asked me.(改为宾语从句）
Cathy asked me____that bridge_____the world"s longest sea bridge.
4.____you have been to America for many times,you must know sth about this country.
A.Since B.Although C.Unless D.When
5.Smile and look for the good things about____when you feel unhappy.
A.other B.another C.others D.the others
6.Jane likes the dress with the stripes very much because it fits____quite well.
A.herself B.her C.hers D.she
7.It's too late to go out now and____,it's starting to rain.
A.though B.instead C.however D.besides