We don’t doubt _____ he will succeed in the research work[ ]

Jimmy is _________one-year-old boy and hehas_________8-year-old sister.

－Excuse me. Could you tell me _________ －Sure. I bought them in a video shop on River Road.

The boss refused to sell the car for ________ he thought was not satisfactory,

It was totally by chance they discovered the entrance to the underground palace.