When the bell rings, every student takes out an iPaD. The light from the screens makes their young ...

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there where when in which

the door bell rang the door bell rings we heard the door bell rings we heard the door bell ring

and but so or

doesn’t begin；rings won’t begin；will ring won’t begin；rings doesn’t begin；will ring

hand in; rings hand in; will ring be handed in; will ring be handed in: rings

the door bell rang the door bell rings we heard the door bell rings we heard the door bell ring

and but so or

the door bell rang the door bell rings we heard the door bell rings we heard the door bell ring

the doorbell rang the doorbell rings we heard the doorbell ring we heard the door bell rings

the door bell rang the door bell rings we heard the door bell rings we heard the door bell ring

doesn’t begin; rings won’t begin; will ring won’t begin; rings doesn’t begin; will ring

the door bell rang the door bell rings we heard the door bell rings we heard the door bell ring

the doorbell rang the door bell rings we heard the doorbell ring we heard the door bell rings

hand in; rings hand in; will ring be handed in; will ring be handed in; rings