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
——How heavily it is raining!——What a pity!We have to_____our sports meeting.
#58432
A
put off
B
put out
C
put on
D
put up
Many teenagers_______ the old and they often offer their seats to the old on buses.
#56287
A
agree with
B
worry about
C
laugh at
D
care for
——Where are the Black family?——They ________ the new zoo.
#53382
A
visit
B
visited
C
are visiting
D
will visit
When the old man saw some litter on the ground, he quickly .
#62853
A
picked it up
B
picked up it
C
picked them up
D
picked up them.