, which is a common plant in thesouth, is used ______ in buildings, food, furniture and so on It is used tomake clothes as well

The plane is due to take off at 7：50 from the airport.—________ we fail to arrive there on time—Try to take another flight then.

Do you mind me sitting beside you— ____ . The seat is for my son.

It’s best to stay indoors, ________when PM2.5 has reached dangerous levels.

How many years is it ______ your family moved here?