London people always take umbrellas with them, just _______ it rains.

 I'll make some sandwiches, just ________ we get hungry later.

________ a child begins school, he enters a world of vicious competition where success and failure are clearly defined and measured.

---- ________ you like the cell pone so much, why not buy it?---- Well, I don’t have enough money.

It may not rain, but you had better take an umbrella__________.