Food safety is important. Rules to stop people from food pollution.
Students often ____________ their best wishes on the blackboard before graduation.
cut down
pull down
write down
die down
The 2022 Olympic Winter Games ____________ in Beijing and Zhangjiakou.
hold
held
is held
will be held
Zhong Nanshan is a medical expert ____________ saves lives and is always honest.
which
who
what
whose
-____________ do you do volunteer work?
- Once a month. I think it is meaningful.
How often
How far
How many
How long
I ____________ five books since I joined the book club.
am reading
will read
was reading
have read