This factory produced much dirty water, which resulted in a wide _______ of environmental problems.
A. branch B. range
C. species D. wave
Please tell me how the accident _______. I am still in the dark.
A. came up B. came out
C. came to D. came about
It is______ of him to set his aim high but do little, so he is always leaving things undone.
A. specific B. typical
C. flexible D. widespread
— Do you think it's a good idea to make friends with your students?
—________, I do. I think it's a great idea.
A. Really B. Hopefully
C. Actually D. Eventually
Mary couldn’t________ the terrible working conditions in that factory and resigned last week.
A. catch up with B. keep up with
C. put up with D. come up with
Some passers-by witnessed the car accident ______ five passengers were killed, a baby included.
A. where B. which
C. that D. when
