During the investigation, two detectives ______ the identities of antiques dealers.

单项选择题When no one answered the door, she ______ through the window to see if anyone was there.

单项选择题We wound ______ the meeting with a vote of thanks to the committee.

单项选择题She ______ to several newspapers to keep track of current events.

单项选择题Starting with the ______ that there is life on the planet Mars, the scientist went on to develop his argument.

单项选择题The summit will be an opportunity for every state head to give ______ to their feelings.

单项选择题Wherever I went, I ______ upon people talking about the World Cup.

单项选择题Among the four sentences below, sentence ______ is the most polite form.

单项选择题Among the four sentences below, it is in sentence ______ that the speaker merely asks for confirmation of his assumption.

单项选择题Among the sentences below, it is sentence ______ that denotes command .

单项选择题Which of the italicized parts functions as a subject