There are only ten children in the class at the moment but it could be

41/50

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

There are only ten children in the class at the moment but it could be twice that after Christmas

There are

in the class

twice

after Christmas

Giải thích

Chọn C

Chỉ có mười đứa trẻ trong lớp vào lúc này nhưng nó có thể gấp đôi sau Giáng Sinh.

So sánh gấp số lần cần có as:

Twice/three times/four times ...as + adj./adv. +as ...: gấp 2/3/4 lần.

Thay bàng: twice as much as.