John's father ______ mathematics in this school ever since he graduated from Harvard University

John's father ______ mathematics in this school ever since he graduated from Harvard University.

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The young seedlings remained alive _____ the protecting snow.

The young seedlings remained alive _____ the protecting snow.

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Page, the naughtiest boy in the class, did this thing on ____, knowing it would make her crazy.

Page, the naughtiest boy in the class, did this thing on ____, knowing it would make her crazy.

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The manager will not _________ us to use his car.

The manager will not _________ us to use his car.

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