Why didn't Lucy come to your birthday party last night?
She said that she had a headache, but that was only a(n)_____________. I saw her playing on the playground just now.( )
result
matter
excuse
expression
The biggest challenge we all face is to prevent further environmental disasters. We ________ take action before it is too late.
can
must
may
might
Yuan Longping and his team have solved the problem of ________ for many people.
hunger
health
pollution
population
-Why are you laughing, Daniel?
- There is ________ funny in the newspaper. Come and see.
anything
something
everything
nothing
During Dr Mar's last visit, he ________ on 150 patients on the ORBIS plane.
operates
is operating
will operate
operated
No one is ________. The key is to learn from mistakes and never stop.
careful
generous
famous
perfect