1 . The problem _______he will have his college education at home or abroad remains untouched.

A．how

B．whether

C．that

D．when

2 . Shackleton kept his promise ____he would return to Elephant Island ____the crew had been left.

A．which; that

B．that; which

C．what; where

D．that; where

3 . Barrack Obama’s recent visit to the Asian nations clearly sent a message to the world _____ Asia is important in America’s global partnership.

A．which	B．where
C．that	D．what

4 . Researchers have found clear and convincing evidence ________ happiness is the key to better health and longer lives.

A．where

B．whether

C．how

D．that

5 . .
Though having discussed it for long, they still haven’t reached an agreement__________they should pour more money into the project.

A．that

B．if

C．whether

D．what