A tourist will easily lose his way in shanghai_____ he has a map or a guide.

Listen ! Peter is singing in the classroom . It _____ be him . He has gone back to hid hometown .

When did you come back last night?—It was not until 11 o’clock ________ the party ended.

As is known to all, the 32nd Summer Olympic Games in Tokyo in 2020.

sabled children, to develop their fullpotential, their education must be________ to their differences from others of the same age