Teachers' Day is _______ September 10, and the Spring Festival is usually_______ February.( )
in; on
in; in
on; in
in; at
The Hong Kong﹣Zhuhai﹣Macau Bridge, the world's ______crosss﹣sea bridge, won another international prize in December, 2018.( )
long
longer
longest
the longest
Miss Chen, my dear English teacher, often encourages me ______the challenges in my study.( )
face
faces
facing
to face
These machines_____in their factory by themselves last year.( )
make
made
are made
were made
Listen! The birds ______ in the trees outside our school.( )
sing
are singing
sang
were singing
Lisa made so many mistakes in her homework, because she didn't do it ______enough.( )
carefully
busily
quickly
warmly