It is believed to _____ over by sandstorms from AD 200 to AD 400.
#88245
A
gradually cover
B
be gradually being covered
C
have been gradually covered
D
be gradually covered
推荐题目
The new government decided to encourage industries ______ technology, which was ______ biology.
#93221
A
basing on; linked to
B
being based on; linking with
C
based on; linked with
D
to base on; linked
Does your new secretary  ____ short hand?
#97549
A
know to take
B
know how to take
C
know how take
D
know how taking
Before going abroad he devoted all he could _______ his oral English.
#97453
A
improve
B
to improve
C
improving
D
to improving
  Badminton is a _____ by an Englishman.
#97369
A
game invented
B
play invented
C
match inventing
D
match invented