Since they aren't answering the phone, they _______ their house.
Form: "Must have done" = diễn tả một sự việc cần thiết phải làm trong quá khứ nhưng đã không làm được
As a millionaire who liked to show off her wealth, Mrs. Smith paid______________________________________________ we asked.
We all agree that she is____________________ student in our class.
The word "allocated" in the passage mostly means "______".
The packages___________________ so that it would be easier to carry them.
We must push the piano to the corner of the hall to_____________________ our party tonight.
There has been a great increase in retail sales,_____________________ ?
Education in many countries is compulsory________the age of 16.
______ one of the most beautiful forms of performance art, ballet is a combination of dance and mime performed to music.
The Lake District,____________________ was made a national park in 1951, attracts a large number of tourists every year.
The examination was not very difficult, but it was_____________________ long.