Are those____keys, Jack?
No, they aren't. They're Uncle____.( )
yours;Sam′s
your;Sam
your;Sam′s
yours;Sam
On our farm, the tea leaves ________ by hand when they are ready.
pick
picked
are picked
were picked
Jim _________ a lot about Chinese culture since he began to study in our school.
learns
learned
will learn
has learned
I ________ about my sister when my phone rang. It was her!
think
will think
was thinking
am thinking
Don’t lose heart. If you keep working hard, you _________ some day.
will succeed
succeed
succeeded
have succeeded
The workers _________ the community center now.
cleaned
were cleaning
will clean
are cleaning