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

单项选择题Which of the italicized parts indicates CONDITION AND RESULT

单项选择题The following determiners (限定词) can be used with plural count nouns and non-count nouns EXCEPT ______.

单项选择题Which of the following sentences contains subjunctive mood

单项选择题Which of the following is a derived word (派生词)