Volunteering our time to help people_______ a good way to learn new things.( )
am
is
are
Chen Wei isn't at school today ________ he is taking a robot competition in Shanghai.( )
so
because
before
if
It was late.She opened the door ________ because she didn't want to wake up her grandma.( )
angrily
quietly
loudly
heavily
Meimei is going to be an older sister.Her parents are planning to have their ________ child.( )
one
two
first
second
Students do less homework now.Usually it ________ before 9 o'clock in the evening.( )
finishes
finished
is finished
was finished
Must we finish the work today?
________.We have something else to do tomorrow.( )
Yes,we can
No,we can't
Yes,we must
No,we needn't