By the time a baby has reached his first birthday, he should ___ sit up or even stand up.
- A. to be able to
- B. able to
- C. to be able
- D. be able to
Lời giải tham khảo:
Đáp án đúng: D
Sau modal verb + động từ nguyên mẫu ko to
Đáp án D đúng
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CÂU HỎI KHÁC
- You have been reading for four hours. This book ___ be very interesting.
- Don’t phone Ann now. She ___ be having lunch.
- 11 p.m is too late for a child to stay up. You _______ go to bed right now.
- You’re having a sore throat. You should better___ to the doctor.
- My mother permitted me to go out at night. She said, You ___ go out tonight.”
- He advised me to take an English course. I ___ it early.
- It must ___ without delay.
- By the time a baby has reached his first birthday, he should ___ sit up or even stand up.