I can’t promise that all the people injured in the accident will be saved. All I can promise is that what _______ be done _______be done.
The boy ________ the father worked in the USA is Jack.
Is this the school _______ you worked last year?
Is this school _____ you visited last year?
The Great wall is the only one of the buildings on the earth_____ seen from the moon.
Is there anything ________ I can do for you?