Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences in the following questions.

Question. Wastewater is treated and turned into drinking water. This is done to ensure there is no shortage of fresh water.

A. For there is shortage of fresh water, wastewater is treated and turned into drinking water.

B. Wastewater is treated and turned into drinking water because there is shortage of fresh water.

C. Wastewater is treated and turned into drinking water though there is no shortage of fresh water.

D. To ensure there is no shortage of fresh water, wastewater is treated and turned into drinking water.

Every weekend is important to the Garcia family. During the week they don’t have very much time together, but they spend a lot of time together on the weekend.

Mr. Garcia works at the post office during the week, but he doesn’t work there on the weekend. Mrs. Garcia works at the bank during the week, but she doesn’t work there on the weekend. Jennifer and Jonathan Garcia go to school during the week, but they don’t go to school on the weekend. And the Garcias’ dog, Max, stays home alone during the week, but he doesn’t stay home alone on the weekend.

On Saturday and Sunday the Garcias spend time together. On Saturday morning they clean house together. On Saturday afternoon they work in the garden together. And on Saturday evening they watch videos together. On Sunday morning they go to church together. On Sunday afternoon they have a big dinner together. And on Sunday evening they play their musical instruments together.

As you can see, every weekend is special to the Garcia. It’s their only time together as a family.

 Mr. and Mrs. Garcia don’t work on _________.

A. Saturday    

B. Sunday

C. Friday    

D. the weekend

Cho đường thẳng ∆ có phương trình x = − 2 + 5 t y = 3 − 2 t . Điểm nào sau đây nằm trên đường thẳng ∆?

A.M1 ( - 2; 5)

B.M2 ( 3; 1)

C.M3 ( 2; - 3)

D.M4 ( 5; -2)