While doing calculation for the project, the designers____a new solution to a geological problem.
#260
A
fell into
B
stumbled upon
C
set out
D
discovered
推荐题目
This area experienced ________ heaviest rainfall in ________ month of May.
#7790
A
不填； a
B
a ; the
C
the ; the
D
the ; a
Ladies and gentlemen, please remain __________ until the plane has come to a complete stop.
#98993
A
seated
B
seating
C
to seat
D
seat
--Thanks a lot for ________me with my English. -- You are welcome.
#49999
A
help
B
helps
C
helping
D
helped
You need a lot of ______ if you want to become a good nurse.
#29836
A
course
B
performance
C
practise
D
training
He had the right to take ________ of the house and farm after his father died.
#5063
A
option
B
regulation
C
possession
D
effect