You can move around the town _____ foot as it is not very big.

A. by
B. in
C. on
D. from

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My aunt has invited me to her place _____ three o’clock this afternoon _____ tea.

A. at; for
B. on; to
C. during; so that
D. from; for

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My uncle, who is a businessman, often travels _____ air.

A. on
B. in
C. by
D. from

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He is so much preoccupied with his job that he has become indifferent ______ his health.

A. for
B. over
C. to
D. with

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have been working hard ______ arithmetic?

A. in
B. at
C. on
D. None of these

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