Space exploration has been made __________ with the development of modern science and technology.

Is it interesting to play computer games?—Yes, _____ you are interested in playing computer games, you’llhave trouble giving it up.

Do you have enough men to carry these chairs —No. I think we need _______ men.

Only when ________ the tea-house ________ it was the same place he had been in last year. [ ]

bought a new dictionary and it ______me $.