Complete the second sentence so that it has a similar meaning to the first one. 

Câu 1: If he doesn’t work harder, he’ll lose his job. 
Unless ______________________________________ .

Câu 2: I have never been here before.  It is the first time _______________________.

Câu 3: You have read this novel, haven’t you?  Have you  _________________________ ?

Câu 4: It was raining hard, so we had to cancel the game. We had to ____________________________________ .

Câu 5: It’s very wonderful to spend the weekend in the countryside. Spending ___________________________________________ .