Loulan is believed ____ by sandstorms from AD 200 to AD 400.
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A
to be gradually covered over
B
to have been gradually covered over
C
being gradually covered over
D
having been gradually covered over
推荐题目
 In class, the students are __________ in the teacher’s words.
#74328
A
losing
B
absorbed
C
attracted
D
addicted
The director is going on business next week and the department will be left ______Jack.  
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A
in charge of
B
taking the charge of
C
taking charge of
D
in the charge of
At the age of eight, he ___     a group of child dancers.
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A
joined in
B
attended
C
took part in
D
joined