They could look after when they were six.( )
A.ourselvesB.themselvesC.yourselves
A landmark(里程碑) in the history of science was made by a photo _______ was taken on April 10th about the black hole in a faraway galaxy(星系).( )
who
which
what
when
Our life _______ greatly by 3D printing technology in a few years.( )
will influence
influences
will be influenced
is influenced
My best friend went abroad. I miss her and feel down today.
Don't be sad. Here is good news for you _______.( )
cheer up
cheering up
cheered up
to cheer up
_______ do you help your mother do housework?
Every day. I think it's our duty to do it.( )
How often
How far
How soon
How much
I saw your light still on at 11 o'clock last night.
Oh, I _______ an interesting talk show at that time.( )
watch
watched
am watching
was watching