1£®They'll carry on with the work _______ they achieve their objective.

2£®There are doubts ________ the new drug will be effective in treating the disease.

3£®The young couple left ________ I could ask for their names.

4£®I have been used in offices________homes since the 1970s.

5£®The price of diamond rings has risen sharply ________ the price of gold rings has gone down.

6£®It is so cold that you can’t go outside _______________ fully covered in thick clothes.

7£®In my class, the girls like volleyball _______________ the boys like football.

8£®We have to realize : boys share activities, _______ girls share feelings.

9£®What has caused great confusion is ____________ the scientist made it without anyone else’s help.