_______ the difficult maths problem, she has consulted Professor Liu several times.
A. Worked out B. To work out C. Having worked out D. Work out
Having been under good treatment in the hospital for a while, the old woman is beginning to _______ and will soon recover.
A. make up B. show up C. pick up D. take up
After he retired from teaching, Robert began to _______ painting.
A. make up B. show up C. pick up D. take up
Mary_______ my letter, otherwise she would have gone to the concert.
A. couldn’t have received B. ought to have received
C. has received D. shouldn’t have received
This is the website _______ I intend to add to my favorites to help me learn how to write poems.
A. where B. what C. which D. why
Unluckily, my classmates and I went to the nearby library to read books last Sunday, only to be told that it ________ .
A. is decorated B. was being decorated
C. is being decorated D. was decorated
