Mary sometimes ________ to turn off the computer before she ________ home.

By the time John ________ to help, we ________ the work.

The students ________ chapter 5 next week, so they ________ to prepare for It now.

These students ________ hard since the beginning of the school year because they ________ their graduation exam next May.

     A. studied / are going to take                     B. are studying / will be taking

     C. study / will have taken                          D. have been studying / will take

They ________ here for three years before you ________ last week.

Jane ________ at my house when you ________

When the president ________ off the plane, the crowd ________ for him for half an hour.

I am sick of rain and bad weather! Hopefully, when we ________ up tomorrow morning, the sun ________.

Look! Mary ________ a beautiful new dress. She ________ so pretty in the dress.

Do you think everything ________ when we ________ from the store?

- I am hungry. I ________ lunch yet.

     - Don’t worry. I ________ you a sandwich.

By the time the boss ________ at 9.00, his employees ________ for two hours.

Women ________ in presidential elections since 1921.

I ________ the time when I ________ as a teacher.

B. am never forgetting / first work

I think by the time we ________ there, Jim ________

The train ________ at 8.58, so we ________ in Scotland by lunchtime.

When I ________ the street I ________ somebody call my name.

- Where ________ on holiday?

     - I don’t know. We ________ yet.

He _______ a good day until a thief ________ into his apartment, _______ all his money, and _______ him up.

-________ to come over for dinner tonight?

     - Oh, I’m sorry, I can’t. I _______ to a movie tonight with some friends.

John ________ his parents in France at the moment. He ________ in New York, but ________ his parents for the past few weeks.

We ________ each other one day while John ________ a book in the library and I ________ down beside him.

John ________ in France, but his parents ________ in Cologne, Germany after living there for five years.

Before we ________ a computer, we ________ that typewriter to type our assignments.

John ________ a lot. In fact, when he ________ only two years old, he first ________ to the USA.

Mr. Pike ________ lunch at home with his wife, but today he ________ lunch with his friends. Mrs. Pike ________ to London since two days ago.

________ to Paris before?

Computers ________ in use since 1946.

What ________ since 8 am up to now?

Cho x, y là các số thực không âm thỏa mãn: x² − 2xy + x − 2y ≤ 0.

Tìm GTLN của M = x² − 5y² + 3x.

- How much is this book?

     - $10.

     - OK. I ________ it.

Cho x, y là hai số không âm thỏa mãn x + y = 2. Giá trị nhỏ nhất của biểu thức \(P = \frac{1}{3}{x^3} + {x^2} + {y^2} - x + 1\)

He ________ his boss at this time tomorrow.

Cho hình chóp S ABCD, có đáy ABCD là hình vuông cạnh bằng 1. Tam giác SAB đều và nằm trong mặt phẳng vuông góc với đáy (ABCD). Tính khoảng cách từ A đến (SCD).

Jeans which ________ by Levi Strauss in 1850 ________ one of the most popular kinds of clothes in our present time.

Cho hình chóp S.ABCD có đáy là hình vuông cạnh a, mặt bên SAB là tam giác đều và nằm trong mặt phẳng vuông góc với mặt phẳng đáy (minh họa như hình vẽ bên). Khoảng cách từ C đến mặt phẳng (SBD) bằng

Sandy ________ TV in the living room at the moment. At this time yesterday, she ________ television. That is all she ________ doing the most.

Cho hàm số f (x) = ax⁴ + bx² + c có đồ thị như hình vẽ dưới đây. Hỏi phương trình 2f (x) = −1 có bao nhiêu nghiệm?

After the boy ________ that the wallet full of money, he ________ to the police and ________ it in.

By this time tomorrow, we ________ on the beach of Hawaii, where we ________ before.