It was March 11, 2011 ____ magnitude-90 earthquake struck Japan and subsequent tsunami triggeredthe large-scale crisis[ ]

Help others whenever you can________you will make the world a nicer place to live in

It was ________ that the PLA men got to the earth-strike area

Only when Tom fully recovered___________back towork

The old man _____live with his wife, but now he ______alone after she died.