I used to go to sleep ________ my bedroom light ________．（ ）
| A． |
with，open |
B． |
with，on |
C． |
and，open |
D． |
in，on |
It's parents' job to ________ a clean and comfortable environment at home ________ their children.
A．support；withB．offer；with
C．give；forD．provide；for
一 What were you doing at the time of the rainstorm yesterday？
一 I ________ at the library after school.
A．readB．was reading
C．am readingD．was read
一 I can't get on well with my family.
一 Why not talk with them？You should communicate ________ things become worse.
A．untilB．unlessC．afterD．before
一 I wonder if this glass is Tom's.
一 It ________ be his.His was broken just now.
A．mustn'tB．may notC．can'tD．shouldn't
Over the past few months，Chinese COVID vaccines （疫苗） ________ in many other countries.
A．have arrivedB．arrived
C．will arriveD．had arrived