Which of the following infinitives functions as an if-clause
A. To be a good citizen, one must obey the law.
B. He opened the door tofind the room empty.
C. I came hereto study English grammar.
D. To hear you sing, people might take you for a girl.
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Which of the following words can both be used as predeterminer (前位限定词) and postdeterminer (后位限定词)
A. the
B. both
C. such
D. all
My nephew ______ from home for three days now, and I am beginning to worry about his safety.
A. has been missed
B. was missed
C. has been missing
D. had been missing
天然强心苷四个环A/B、B/C、C/D一般为
A. 顺/反、反、顺
B. 顺、顺、顺
C. 反、顺、反
D. 顺/反、反、反
E. 反、反、反
In the sentence "He has a wish to travel round the whole country", the italicized part is
A. an attribute.
B. an adverbial.
C. a complement.
D. an appositive.