单项选择题

Every knife and fork __________ carefully.

A．have cleaned
B．has cleaned
C．have been cleaned
D．has been cleaned

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热门试题

单项选择题

In what ways are elephants like the human beings（）

A．They never forget great sadness or great happiness.
B．They live in families of females.
C．They live together for a long time.
D．They have daughters, mothers and grandmothers.

单项选择题

They all study hard but she studies the hardest __________.

A．all
B．of all
C．in all
D．all in all