If _______ unsolved, this may lead to more serious problems.
A. making B. remained C. left D. taking
The new movie _____to be one of the biggest money-makers of all time .
A. pretends B agrees C. promises D. declines
Unfortunately, the element Madam Curie devoted all her life her death.
A. to caused B. causing C. to be caused D. to causing
Out of the crowded bus , who was dressed in a black suit and waved to a woman.
A. a tall man in his thirties stepped B. stepped a tall man in his thirties
C. did a tall man in his thirties step D. did a tall man step in his thirties
When exposed to stress, in ________ form, all of us react both chemically and physically.
A. whichever B. whatever C. however D. whenever
After he was promoted to the present position, he is not so hardworking as he ______.
A. was used to B. used to be C. was used to being D. used to
