Mary told me that she had been to China （ ） .（two）分全给你,教教我.

Mary told me that she had been to China （ ） .（two）分全给你,教教我.
Mary told me that she had been to China （ ） .（two）
分全给你,教教我.

Mary told me that she had been to China （ ） .（two）分全给你,教教我.
twice.
Mary 告诉我她已经去中国两次了.
have been to 后加地点再加次数

twice

玛丽告诉我她曾经去过中国

玛丽告诉我她曾经去过中国两次了