Q:Why is it getting warmer and warmer these years?A:It's saidQ:Why is it getting warmer and warmer these years?A:It's said that's greenhouse effect .Scientists______(study) the global warming these years,but ____(not solve)it yet .Q:The snow _____(st
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Q:Why is it getting warmer and warmer these years?A:It's saidQ:Why is it getting warmer and warmer these years?A:It's said that's greenhouse effect .Scientists______(study) the global warming these years,but ____(not solve)it yet .Q:The snow _____(st
Q:Why is it getting warmer and warmer these years?A:It's said
Q:Why is it getting warmer and warmer these years?
A:It's said that's greenhouse effect .Scientists______(study) the global warming these years,but ____(not solve)it yet .
Q:The snow _____(stop).Let's go out to make a snowman.A:OK.
Q:He was really a whiz kid .By the time he_____(be)ten,he _____(run)a company of own.A:I thougt so.
Q:Why is it getting warmer and warmer these years?A:It's saidQ:Why is it getting warmer and warmer these years?A:It's said that's greenhouse effect .Scientists______(study) the global warming these years,but ____(not solve)it yet .Q:The snow _____(st
have been studying; haven't solved
stops
was; had run
不明白的再问哟,请及时采纳,多谢!
are studying haven't solved stops was has wun
have been studying
have not solved
has stopped
was was running