Whoever leaves the lab last, _____ all the lights are turned off.

The reason ________ he went to California was ________ he had been looking forward to finding gold[ ]

The professor________ the perfect return ofShenzhou 7 in 2008______ “the most exciting thing in history” in his speech.

No one tells us________，so we need your help

Can you finish the work betterwith ______ money and _____ people