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【单选题】
在下列各组物质中，分别能使紫色石蕊溶液变为红色、不变色、变为蓝色的是（ ） 物质 牙膏 橘汁 血浆 食盐水 肥皂水 柠檬汁 草木灰 的滤液 厕所 清洁剂 pH 8.2 3.5 7.4 7 9.2 2.5 10.6 1.7A.
牙膏、蒸馏水、肥皂水
B.
橘汁、食盐水、草木灰的滤液
C.
柠檬汁、食盐水、厕所清洁剂
D.
草木灰的滤液、蒸馏水、柠檬汁
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【单选题】I wish I _____a car．It would make life so much easier.
A.
have
B.
had
C.
had had
D.
will have
【单选题】()是顾客与企业共创价值的过程,具体来说是指企业提供价值主张并传递价值,顾客从各个角度感知价值并为企业创造价值的过程。
A.
体验营销
B.
服务营销
C.
关系营销
D.
数字化营销
【简答题】Hi Grace, How’s it going? Sorry I haven’t emailed for a while, but I had so much to do! I had told you about my decision to take up a sport. I knew I wasn’t fit and I wanted to get some exercises. But...
【单选题】John talked with me for about an hour yesterday. Never _______ him talk so much.
A.
had I heard
B.
did I hear
C.
I had heard
D.
I heard
【简答题】Hi Grace, How's it going? Sorry I haven't emailed for a while, but I had so much to do! I had told you about my decision to take up a sport. I knew I wasn't fit and I wanted to get some exercise. But ...
【单选题】I wondered ______ they had raised so much money on their own to help youngsters in need.
A.
what
B.
that
C.
how
D.
why
【单选题】If the prediction for the earthquake ________ more accurate, we would have been more prepared and many more lives would have been saved.
A.
had been
B.
was
C.
has been
D.
were
【单选题】_____ that air conditioners cause so much pollution, I would never have bought one.
A.
Had I known
B.
I had known
C.
Were I to know
D.
Did I know
【单选题】I had travelled only two hours one day ______ the winds increased so much that I had to put my tent up _______ the winds became too strong. [ ]
A.
when , before
B.
when , after
C.
when, until
D.
until , before
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