On April 12, 1961，_____27—year—old Yuri Gagarin(尤里.加加林)became the first human to go into_____ space.

The hotel is almost finished, but it _____ needs one or two weeks to get ready for guests.

We find it ___________ to do some reading every day.

Is this_____football, boys?——No, it is not.

Is that your best friend Kitty?— No, it _________ be her. She flew to Singapore yesterday.