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15. ____ ! There is a train coming.

A. Look out               B. Look around            C. Look forward         D. Look on

10. ____ ! There is a train coming.

A. Look out               B. Look around            C. Look forward         D. Look on

10. ____ ! There is a train coming.

A. Look out               B. Look around            C. Look forward         D. Look on

10. ____ ! There is a train coming.

A. Look out               B. Look around            C. Look forward         D. Look on

10. ____ ! There is a train coming.

A. Look out               B. Look around            C. Look forward         D. Look on