A． which B．which was C．they have D．it isThey usually ha……

单项选择题After a long and tiring journey, they arrived ________.

单项选择题When her neighbor Grandma Wang became ill, the girl often ________.

单项选择题—Have you finished the packaging —________ — Good. Because the truck will be coming soon, this is a rush job.

单项选择题Please take what you like, you ________ eat too much.

单项选择题A new technique ________, the gross output increased by 20 percent.