What’s your first impression ________ Mrs Wang?—-She looks serious. I think she’ll be strict _____ us _______her own work.

Where have you _________ all day? —I came back at noon and I _________ in this room ever since.

The Internet plays _______ an important part in our society _______ it has influenced our life.

Where is Sally, Jack?—She _________. She wants to be a swimming player.

The rainstorm killed __________ people at year.