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【单选题】
在下列有关氧化还原反应的叙述中,正确的是A.
肯定有一种元素被氧化，另一种元素被还原
B.
在反应中不一定所有元素的化合价都发生变化
C.
置换反应一定属于氧化还原反应
D.
氧化还原反应中的任一反应物，不是氧化剂，就一定是还原剂
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【单选题】— Our class won the English speaking contest. — Congratulations! You _____ be very proud of it. [ ]
A.
can
B.
need
C.
would
D.
must
【单选题】— I came out first in the English Speaking Contest. — ________________________
A.
Congratulations!
B.
You can say it again!
C.
It’s very nice of you .
【单选题】There ______ an English speaking contest (演讲比赛) for middle school students in our city in early July. [ ]
A.
is going to
B.
will be
C.
will have
D.
is
【单选题】The shy girl has won the gold medal in the speaking contest, ______ I find hard to believe.
A.
that
B.
which
C.
who
D.
whom
【单选题】---Are you going to take part in the English speaking contest? ---_______. It’s too good an opportunity to miss.
A.
That’s for sure
B.
No problem!
C.
Why me?
D.
Why bother?
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