单项选择 较难0.4 引用1 组卷661
________ the doors were closed, and ________ all the lights were off, the boy opened the door to his bedroom.
| A．Having checked; that | B．Having checked; / |
| C．Checking; where | D．To check; that |
19-20高三下·天津静海·阶段练习
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The young lady, ________ several attempts to fix her cell phone, decided to have another try.
| A．making | B．to have made |
| C．having made | D．made |
When making scientific experiments, ________.
| A．temporary setbacks would easily discourage people |
| B．one should not be discouraged by temporary setbacks |
| C．what discourages people may be those temporary setbacks |
| D．it is important to avoid being discouraged by temporary setbacks |
_____ his conclusion on the evidence he collected on the spot, he proved that the murderer was guilty.
| A．Based | B．Basing | C．To base | D．Being based |
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