It is necessary _____ something to protect our environment.
#50188
A
do
B
to do
C
does
D
doing
推荐题目
In the shopping mall，there’re many different kinds of boots for people __________.
#48802
A
choose
B
to choose
C
choose from
D
to choose from
—Doctor, I am afraid I am getting fat these days.— slim, you should change your diet and lifestyle.
#51169
A
Keeping
B
Keeps
C
Keep
D
To keep
The thief was noticed _____the office building by the back door on the screen.
#51161
A
enter
B
enter into
C
to enter
D
to enter into
That __________earthquake ___________ all the people of the city.
#50567
A
frightening; frightened
B
frightened; frightening
C
frightening; frightening
D
frightened; frightened