Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Had the committee members considered the alternatives more carefully, they would have realized that the second was better as the first.

A. more carefully

B. Had the committee members 

C. second was

D. as the first

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

I really believe my letter came as a great surprise to John.

A. John might be very surprised to receive my letter. 

B. John might have been very surprised to receive my letter. 

C. John must be very surprised to receive my letter. 

D. John must have been very surprised to receive my letter.

75% bạn ơi.Mình thi violympic vật lý Hiệu suất của dòng nước là:

\(\dfrac{22.30}{880}\).100=75%(Mình làm cách này đúng đấy, ai có cách khác chỉ mình với nha)

bằng 18 hay sao đó bạn(mình tính ra vậy)

chắc vội quá nên lộn chỗ nào đó. Đáp án là 0,67.