The world’s population is getting larger and larger, so scientists are trying to _______ new ways to solve the food problem.
#56879
A
catch up with
B
keep up with
C
come up with
D
make up with
推荐题目
--- Can you help me with the bike? --- Sorry, I’m a little busy now. Read the instruction. It______, “Do it yourself”.
#54746
A
speaks
B
talks
C
tells
D
says
Paul’s parents were worried that he ____ too much time chatting on line.
#58915
A
spent
B
cost
C
paid
D
took