1._____the tortoise was slow, he tried hard to win the race. A.When B.Despite C.Because D.Although 2.The princess was so_______that she lost her ability to speak. A.frightened B.frighting C.fright D.frightening 3.Nick was doing some Internet research____Vietnamese legends. A.by B.with C.in D.on 4.At 8 o'clock yesterday morning, my daughter____an entrance test to High school. A.was having B.will be having C.is having D.had

`1.` `D`

`-` Loại `A` , `C` vì không hợp nghĩa.

`-` Loại `B` vì despite + N/Ving.

`-` Although + clause : mặc dù

`2.` `A`

`-` tobe + adj

`-` Vì The princess là danh từ chỉ người `->` dùng tính từ đuôi -ed.

`3.` `D`

`-` research on : nghiên cứu về ...

`4.` `A`

`-` At 8 o'clock yesterday morning `->` Quá Khứ Tiếp Diễn 

`-` Công thức thì QKTD : 
`(+)` I/ You/We/They/N số nhiều + were + Ving
        She/He/It/ N số ít + was + Ving
`(-)` I/ You/We/They/N số nhiều + were + not + Ving
       She/He/It/ N số ít + was + not + Ving

`(+)` Were + I/ You/We/They/N số nhiều + Ving ?
        Was + She/He/It/ N số ít + Ving ?