—Dear me! It’s you, Bob! I ______ to recognize you at first sight!—Nor did I! Time has changed us a lot!
A dog ran out ___ behind tha gate.
The car ran ___ the direction of Shanghai.
What animal can live both ___ land and ___ the water.
Mr Chen was ___ early thirthies when he went abroad to have his further studies.
Children often get presents ___ Christmas and ___ their birthdays.