The phone________ constantly since Jack won the first prize this morning.
A. has been ringing
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The Red River________ very fast today-much faster than yesterday.
I________ "Chicken soup for the soul" but I haven’t finished it yet.
In the last two decades, space exploration___great contributions to weather forecasting.
If coastal erosion continues to take place at the present rate, in another fifty years this beach________ any more.
Last night Tine________ in bed when suddenly she heard a scream.
On July 20, 1969, Neil Armstrong ________ down onto the moon, the first person ever set foot on another planet.