---Is ___ here? ---No, Wang Bo and Li Mei are absent(缺席).
If you have headaches often, you need _______ .
He wasn’t _____ to understand the questions.
The strong young man can swim ______ the river.
The boss(老板) makes the workers _____ these machines(机器) for ten hours a day.
—Kangkang, will you _____ your photos _____me tomorrow? —OK.