There is no doubt________man will continue to explore the vast universe in the future, but the rate at which we approach depends on the development of technology.[ ]

This is______ English book, and______ is on the desk.

Who teaches______singing—Nobody, I learn it by_______.

Excuse me, would you mind if I use your phone—____ It is on the table over there.

Two years ago, she bought an expensive mountain bike and then she persuaded me to buy _______.