-----Where are the children? Professor Zhang has come and his speech will start soon.------I wish they always late.
I have no idea _______ we can do with these waste materials.
FBI stands _________ Federal Bureau of Investigation.
His work _________ have been completed; otherwise, he wouldn't be enjoying himself on the beach.
He wondered __________ the pyramids were built.
He insisted that he __________ and that he ________ nothing wrong.