Bob is absent; he______ sick gain now.
A. must have been
B. must be
C. must be being
D. must being
KEY: B
GIẢI THÍCH: must V: phỏng đoán điều chắc hẳn xảy ra ở hiện tại
Dịch: Bob vắng mặt, anh ấy chắc lại bị ốm rồi
That machine is useless. It_______not been used for a long time
________ the internet is very popular, many older people do not know how to use it.
She made no ___________to her illness but only to her future plans.
.________ having the best qualifications among all the applicants, Justin was not offered the job.
Ms. Black and Ms. White are talking about Mr. Brown’s upcoming retirement.
Ms. Black: “Mr. Brown is going to retire next month.”
Ms. White: “ _______________”.