Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
The families were told to evacuate their houses immediately_________.
A. at the time when the water began to go up
B. when the water began to rise
C. when up was going the water
D. in the time when the water raised
Có thể dễ dàng nhìn thấy A, D dùng sai liên từ.: không thể at/in the time + when; C cũng sai vì không dùng đảo ngữ. Đáp án là B. when the water began to rise: khi nước bắt đầu dâng