_______ several times, but he still doesn’t know how to do it properly.
| A．Being shown | B．Having shown him |
| C．Having been shown | D．I’ve shown him |
相关试题
----May I smoke here ?
-----If you , choose a seat in the smoking section .
| A．should | B．could | C．may | D．must |
I like getting up very early in summer. The morning air is so good .
| A．to be breathed | B．to breathe | C．breathing | D．being breathed |
-----She looks very happy. She have passed the exam.
------I guess so. It’s not difficult after all.
| A．should | B．could | C．must | D．might |
----Did Peter fix the computer himself?
-----He , because he does know much about computers.
| A．has it fixed | B．had fixed it | C．had it fixed |
D．fixed it |
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