15. My brother and I................swimming almost every day last summer. A. went B. had been going C. were going D. had gone

16. We............ when someone knocked at the door. A.Talked B. had talked C.were talking D. were talked

17. When the robbery happened, the security guard..................! A. slept B. was sleeping C. had slept D. was slept

18. Jack...................chess before so I showed him what to do. A. hadn't been playing B. didn't play C. wasn't playing D. hadn't played

19. I wasn't sure how Belinda would react because I............ her Iong. A. didn't know B. wasn't knowing C. hadn't been knowing D. hadn't known

20. Ian.................. at the factory long when he was made a manager. A. hadn't been working B. wasn't working C. didn't work D. wasn't worked

21. I wanted to say goodbye to Jerry, but he............. A. was already left B. already left C had already been leaving D had already left

22. When we got to the airport, I realised I................ my passport at home! A was left B had left C left D had been leaving

Cho hình thang cân ABCD ( AB//CD ) có E và F lần lượt là trung điểm hai đáy AB và CD. Chứng minh EF vuông góc với AB.

Rewrite correcly. Change the words or phrases in bold

1.My dad is often getting up late on Sarturday mornings.

.........................................................................................

2.Are you speaking any other languages apart from English?

.........................................................................................

3.I already buy all my Christmas presents and it's only October!

.........................................................................................

4.It's the first time I'm ever having a party at home.

.........................................................................................

5.Actually, I think Darren does works quiet hard sometimes.

.........................................................................................

6.Carlo is never eating Chinese food before.

.........................................................................................

7.Sean already books a table for tonight.

.........................................................................................

8.Needs Melanie any help painting her new flat?

.........................................................................................

Rút gọn biểu thức:

a) A= \(\left(5a+5\right)^2+10\left(a-3\right)\left(1+a\right)+a^2-6a+9\)

b) B= \(\dfrac{\left(x-1\right)^2}{4}+x^2-1+\left(x+1\right)^2\)

Tìm giá trị lớn nhất của các biểu thức sau:

a) A=8a-8a²+3

b) B=b-\(\dfrac{9b^2}{25}\)