John does important research _______ the best ways to help the old.
#48571
A
finds
B
finds
C
found
D
to find out
推荐题目
_____ the environment is important for human beings.
#50494
A
Take care of
B
Taking care of
C
Took care of
D
Take the care of
—Have you read the poems ______ by Du Fu? —Of course, many of them.
#48760
A
wrote
B
writing
C
named
D
written
People living in cold climates prefer to use warm clours a warm and comfortable feeling there.
#50262
A
to create
B
to creating
C
creates
D
create
She looks very busy . I want to help her , but I don't know ___________ .
#50250
A
what to do
B
what to do it
C
how to do
D
why to do