Sally is always looking in the mirror, _______herself.

—How did your father　　　　smoking?—The doctor told him to do so，and he took the advice.

To ________ the web page, you press this button, which makes the most recent information appear.

There’s no way of knowing why one man makes an important discovery ___ another man, also intelligent, fails.

Despite the rising costs of many products, bus fares in the city of Zhuzhou ______ unchanged.