If you ... do the exercise. I'll explain for you.

A. can

B. could

C. can't

D. couldn't

As last, they ... at the station in time.

A. went

B. came

C. arrived

D. viable

Thousands of people died, and hundreds were injured,... the fact that scientists had warned them about the eruption.

A. despite

B. though

C. even though

D. in spite of

I want to study English and I would like to have some informations about your school.

A.wan to study

B. would like

C. some informations

D. about your school

1.A. connect B. notice C. sociable D. co-operation

2.A. invited B.visited C. worked D. ended

3.A. equipment B. elevate C. emergency D. experiment

4. A. pens B. joys C. chairs D. books

5.A. fund B. rug C. sunbath D.lunar

Cho A=\(\frac{3}{x−12\sqrt{x}+40}\)

Tìm giá trị lớn nhất của A

Giá trị đó đạt được khi x bằng bao nhiêu?