A. must have been working
B. should have been working
C. would have been working
D. will have been working
Giải bởi Vietjack
Đáp án A.
- must have + been + V-ing: ắt hẳn đã, chỉ một phán đoán có tính lập luận, chắc chắn, nhấn mạnh đến tính kéo dài của hành động.
Ex: He has a sore throat after a 5-hour lecture. He must have been talking too much.
- must have + PP: ắt hẳn đã, chỉ một phán đoán có tính lập luận, chắc chắn, nhấn mạnh đến chính hành động.
Ex: He sweated a lot. He must have run here to catch up with you.
Smoking is extremely detrimental to health, _____ many people continue to smoke anyway.
Many years ago, black children were _____________ to discrimination in many schools.
The authorities recommend that the meeting _____________ next Monday.
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
We decided to spend ______ summer in ______ seaside town.
As a small boy, he used to _______ alone in the house for an hour or two.
Her husband is very kind. He always cares _____ her and never puts all of the housework her.
One member of the project group_______the boss and was fired immediately.
The archaeological excavation _____ to the discovery of the ancient city lasted several years.
