Is _________ 48 hours _________ the man-made satellite _________ is made in our country to orbit the planet around?
Tom was ______ that he couldn’t understand ______ difficult sentence.
_______ done for us?
takes me several hours my tasks. Because they are too difficult.
They must be working because they have a lot of work to do yesterday.
“How does he makeliving”? Asmatter of fact, He is a policeman.