A.A. realize
B.B. realized
C.C. have realized
D.D. had realized
第1题
_in our daily life.
A. option
B. goodness
C. thing
D. change
第2题
Do you know what___so much greenhouse gases in the air?
A. producing
B. has produced
C. will produce
D. produces
第3题
When you visit the room, the electronic facilities in it can___and recognize you.
A. interview
B. identify
C. instruct
D. introduce
第4题
You___have come to the concert. It was excellent.
A. may
B. need
C. ought to
D. must
第5题
in the last twenty years.
A. takes
B. took
C. have taken
D. should taken
第6题
It will not be long before everyone___the importance of computer skills at work.
A. will see
B. have seen
C. sees
D. would see
第7题
The problem of global warming___for decades.
A. has been existed
B. has existing
C. being existed
D. has existed
第8题
Lowering personal production of waste___everyone over the past decade.
A. benefited
B. has benefited
C. benefits
D. benefiting
第9题
Let everybody___something to reduce environmental pollution.
A. do
B. to do
C. doing
D. do it
第10题
ng carbon footprints.
A. will often see
B. often see
C. are often seeing
D. have often seen
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!