Mike stayed ___ his family ___ a week. [ ]

My cousin would like to risk _____ the weight-loss pills rather than _____ in a gym. —Really? She must be mad.

We didn’t enjoy the picnic that day only _______ the bad weather. [ ]

.－Who taught _____ to swim?－I learned it by _____.

Since my return to China, I haven’t seen my host mother in America; nor______from her.