the teacher explained the question clearly， all the students understood it quickly.
Although
As
Before
The movie was perfect some boring scenes (场景) at the beginning.
instead of
except for
besides
the development of AI， many jobs may be replaced by robots.
With
As
By
Our art teacher encourages us colourful things in life.
look for
looking for
to look for
to looking for
The Internet can be a useful tool， but don’t let it up all of your time.
to take
take
taking
Tom hopes a good student in his class and his father wishes a strong body.
to be;him have
him to be； him to have
to be； him to have
Our headmaster will invite a scientist us a speech on space technology.
given
giving
to give
She enjoys __________ to music in the evening.
listening
listened
to listen
listen
He decided __________ a new bike.
bought
buying
buy
to buy
My mother asked me __________ the floor.
sweep
swept
sweeping
to sweep
They finished __________ their homework at 9 p.m.
did
to do
doing
do
It's important __________ enough sleep every night.
have
having
had
to have
I avoid __________ too much junk food.
eating
ate
eat
to eat
She promised __________ me with my project.
helped
to help
help
helping
We practice __________ English every day.
speaking
spoke
speak
to speak
He hopes __________ a doctor in the future.
become
becoming
to become
became
They suggested __________ a movie tonight.
watch
watched
watching
to watch
It's difficult __________ a foreign language well.
learned
learning
learn
to learn
She can't stand __________ in long lines.
wait
to wait
waited
waiting
He agreed __________ us some money.
to lend
lending
lend
lent
We are considering __________ to Beijing for vacation.
went
go
going
to go
She needs __________ her room before going out.
cleaned
cleaning
to clean
clean
This new software will mean __________ for all the staff.
to train
to training
training
My house isn't worth __________ a lot of money on. We're going to sell it soon.
spending
to spend
spend
to spending
I'll never forget __________ by my favourite author when I was a child.
to meet
meeting
She tried __________ the window, but it was stuck shut.
pushing
to push
I can't help __________ that we've made a mistake. The numbers don't add up.
thinking
to think
think
The film was so bad that we left without __________ the end.
see
seeing
to see