— That’s the third time he’s won the award in this field.
— Yes. He ______ his maximum potential in the past decade.
A.explored B. is exploring C. has been exploring D. has explored
It is clear that in modern society high _______ and demands are placed on students.
A. motivations B. expectations C. standards D. opportunities
___ himself in carrying out an experiment, he can’t spare time to look after his children.
A. Occupied B. Having occupied C. Occupying D. Having been occupied
This argument sounds reasonable, but ___________ it’s incorrect.
A. fortunately B. actually C. naturally D. obviously
This dictionary, which I bought yesterday, has been highly _______ by my professor.
A. acknowledged B. appealed C. recommended D. commanded
It is thought that Henan Shuanghui Industry Group Co., Ltd. ____take responsibility for its consumers.
A. can B. may C. must D. need
