The manager raised his voice __________ he could be heard clearly.

This college allows students to develop their own interests, to ______　extent they wished． 

I can’t see any reason to use cash anymore       it’s so much easier to use other means of payment.

We expect her to do the housework as well _________ after the children.

Two professors at Harvard University published a study of 3,300 new graduates, looking at ______ their names had any bearing on their academic performance.