2020-2021学年上海市七宝高中高二上学期11月周测英语试题 PDF版含答案（无听力试题）

Periodical
Test
Unit
4
I
Grammar
Humans
are
no
strangers
to
widespread
a
vaccine
is
developed,
it
gives
us
hope
for
the
future.
now
the
world
is
waiting
for
a
to
combat
coved-
Scientists
worldwide(2)
sleeves
to
work
toward
an
effective
novel
coron
Under
the
coordination
of
the
World
Health
Organization
(WHO),
up
to
172
countries
have
been
engaging
with
the
largest
and
most
diverse
covid-19
vaccine
portfolio,
an
initiative
3)
Facility
COVAX
is
a
mechanism
for
joint
procurement
and
pooling
risk
across
multiple
es.
When
a
vaccine(4
(prove)to
be
safe
and
effective,
all
countries
in
the
facility
will
be
able
to
access
it,
according
to
xinhua
The
initiative
aims
to
ensure
that
all
countries,
(5)
their
economic
status
is,
can
get
he
vaccine
in
a
timely
manner
when
one
is
available.
It
also
makes
sure
that
prices
is
kept
as
low
as
possible
a
number
of
vaccines
are
now
in
the
final
stage
of
clinical
trials.
"said
wHo
Director-General
Tedros
adhanom
(add)
that
the
goal
of
CovA
is
to
deliver
at
least
two
billion
doses
of
vaccines
by
the
end
of
2021
guarantee)
the
equal
access
and
fair
allocation
of
covid-19
vaccines,
the
who
has
said
that
the
world
needs
to
prevent
va
nationalism-
countries
putting
their
own
interests
ahead
of
(
8)
In
trying
ure
supplies
of
a
possible
Vaccine
nationalism
only
helps
the
virus,
Tedros
warned
that
it
would
lead
to
a
prolonged
pandemic
if
only
a
small
number
of
countries
got
most
of
the
supply
Like
an
orchestra,
we
need
all
instruments(9
(play)
in
harmony
to
create
music
that
everyone
enjoys
accine
development
looks
promising,
since
several
countries
have
made
substantial
progress
and
these
types
of
(test)on
human
patients.
Russia
began
production
of
its
first
batch
of
a
CoviD-19
vaccine
on
stry.
It's
the
world's
first
registered
started
intermational
phase-
3
clinical
trails
第1页共6页