Sons and Lovers is an autobiographical novel of ______.

单项选择题Canadian children are encouraged to learn both ______ and ______ at school.

单项选择题Which of the following is not a design feature of language

单项选择题______ is not one of William Shakespeare's four greatest tragedies.

单项选择题______ is the most important of all American crops.

单项选择题The Virgin Islands are located ______.