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【单选题】
____alone in the dark room, the little boy was so frightened as to cry.A.
Leaving
B.
Having left
C.
To be left
D.
Left
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举一反三
【单选题】It wasn’t long ___ the rain stopped and the moon came out again.
A.
when
B.
until
C.
before
D.
since
【单选题】The moon , we came to the foot of the mountain.
A.
appeared
B.
appears
C.
appearing
D.
have appeared
【简答题】什么是产品标识？产品标识的目的是什么？
【简答题】铸工造型时严格禁止 型砂,以免迷住眼睛。
【单选题】In the first 24 hours after abandoning a vessel, water should be given only to personnel who are ______.
A.
sick or injured
B.
wet
C.
Awake
D.
thirsty
【单选题】A plane can't fly to the moon because ______.
A.
the moon is 240 kilometer far away
B.
we don't know where it is
C.
it can't fly without air
D.
there is no air on the moon
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