Her mother tells me that she ______ professionally since she was four
A. has been sung
B. was singing
C. is singing
D. has sung
Dùng thì hiện tại hoàn thành với trạng từ "since", vế có "since" chia thì quá khứ đơn:
Cấu trúc: S + have/ has + Ved/V3 + since + S + Ved/V2
=> Jane is a wonderful singer. Her mother tells me that she has sung professionally since she was four.
Tạm dịch: Jane là một ca sĩ tuyệt vời. Mẹ cô ấy nói với tôi rằng cô ấy đã theo ca hát chuyên nghiệp kể từ khi cô ấy bốn tuổi.
Đáp án cần chọn là: D
Tom often watches TV after his parents ______ to bed.
He ______ off alone a month ago, and _______ of since then.
I’d like to see that football match because I ______one this year.
None of the students ______ to class yet.
Up to now, the discount ______ to children under ten years old.
A digital camera is used for _____ the pictures and video clips in electronic format instead of to film.
Their children ______ lots of new friends since they ______ to that town.
I can’t believe that you ______all the three exercises. You just started five minutes ago.
A smart watch is used _____ you access to lots of information besides the time of day, such as missed calls, messages, and emails.
They often use a webcam _____ moving pictures and sounds and allowing these to be broadcast on the Internet.
People use a tooth sensor ____ any bacteria causing cavities, or any other infections in your teeth.
Lima Billboard in Peru is used _____ clean water from Lima’s extremely humid air.