Scientists ____ thousands of chemicals before they decided on the right one in the end.
#71101
A
tried out
B
found out
C
worked out
D
turned out
推荐题目
— How do you ______himself now you're retired? — I intend to ____ golf to spend the rest of my life.
#83479
A
occupy; get into
B
associate; make up
C
charge; get down to
D
devote; take up
I don’t have the information about SARS, but I’ll _____ later.
#75497
A
find
B
find it
C
find out it
D
find it out
They have made medicine from a new plant _____a cure for fever.
#77123
A
used it as
B
using as
C
and used as
D
used as
People _____hobbies because these activities can offer enjoyment, friendship, knowledge and relaxation.
#71748
A
ake up
B
ress up
C
ake up
D
ut up