动词填空  用括号内所给动词的适当形式填空。
–Three years _____________( pass) since Mike came to China.
We hope the problem _____________( deal ) with as soon as possible.
Do you find it exciting ___________( ski ) alone in the mountain?
—Will you ever leave her alone?
— Only if she ________ (ask) me to.
If the giant pandas  ____________( not protect), there will be none left in the world.
He ___________( read ) a book about nature when I went into the classroom.
David was so weak at English that he had difficulty ____________( get ) into a good university.
— I have already decided not to study abroad.
— Really? I thought you ________ ( not give) up the chance forever.