(2013·天津新华中学二次月考)________ several times，he still couldn't understand how to operate the machine.
#89556
A
Telling
B
Having told
C
To be told
D
Having been told
推荐题目
_______ by thick bamboo and high forest, the ancient city hadn’t been discovered until the 1990s.
#91682
A
Surrounding
B
Surround
C
Surrounded
D
Having surrounded
_______ with the size of the whole earth, the highest mountain does not seem high at all.
#94302
A
Compare
B
Comparing
C
When compared
D
When comparing
_____ that there is no opposition , I will report it to the general manager .
#97769
A
To provide
B
Be provided
C
Having provided
D
Providing
With several students , Mr. Smith came into the lab.
#96059
A
follow
B
followed
C
following
D
to follow