题目列表(包括答案和解析)
The secretary worked late into the night, _____ a long speech for the president.
| A．to prepare | B．preparing | C．prepared | D．was preparing |
The secretary worked late into the night, ______ a long speech for the president.
| A．to prepare | B．preparing | C．prepared | D．was preparing |
The secretary worked late into the night, _____ a long speech for the president.
A．to prepare B．preparing C．prepared D．was preparing
The secretary worked late into the night, ______ a long speech for the president.
A．to prepare B．preparing C．prepared D．was preparing
. The secretary worked late into the night, ___________ a long speech for the president.
| A．to prepare | B．preparing | C．prepared | D．was preparing |
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