— It's difficult for the village children to cross the river for school.
—I think a bridge ______ over the river.

单项选择题—Have you ______ your father recently —No. He doesn't often write to me.

单项选择题I have got many collections of snow globes. You may take ______ if you like.

单项选择题David is good ______ English, but he doesn't do well ______ PＥ.

单项选择题After the United States government reported ______ consumer demands for gasoline, market oil prices closed at $72 a barrel.

单项选择题Fields Bank offered credit lines of up to $10,000 at ______ interest rates to attract more small business owners.

单项选择题Would you please ______ the new words for us

单项选择题Cornwall Research Facility in Salem primarily focuses on lung cancer research ______ treatment.

单项选择题—What's in the ______ —There are some ______ and ______ in them.

单项选择题Alexis ______ her Canadian dollars for RMB before her trip to Beijing.

单项选择题课堂教学中，经常出现教师在学生不注意参与学习时突然加重语气或提高声调的现象，教师采用这种手段的目的是为了引起学生的( )。