To be honest, I didn’t______ him at first sight. About an hour later, I remembered him.
| A．realize | B．understand | C．see | D．recognize |
--What do you think of cloning?
--No doubt it’s a great invention. But ________, it may have some side effects.
| A．if not properly handling | B．if properly not handled |
| C．if not properly handled | D．if properly not handling |
（年(春)重庆市高三考前冲刺测试卷）5. Traditionally __ as one of the safest planes, the Boeing 777's reputation has been damaged by the second crash in less than a year.
| A．to be regarded | B．regarded | C．having been regarded | D．regarding |
——How wise of you to come round，but why？
——______ that all is right.
| A．See | B．To see | C．Seeing | D．For seeing |
（年福州市高三适应性练习）30. In general, _______ energy, we turn off the lights for Earth Hour on the last Saturday in March.
| A．saved | B．saving | C．to save | D．having saved |
（年北京市西城区高三5月二模试题）24. Grandpa was shocked by the news. Rarely ______ him so quiet.
| A．do I see | B．had I seen | C．I had seen | D．I saw |