题目内容

pron. who

A. 谁的
B. 什么
C. 谁

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prep. 横过，穿过

A. across
B. cross
C. over

n. 草地

A. plant
B. class
C. grass

v. 打字

A. copy
B. type
C. tape

请将 “open the window!”改写成现在进行时

A. He are opening it.
B. He is opening it.
C. He was opening it.