用括号中所给词的适当形式填空。
（1）This is not my pencil-box. ________ (I) is in the bag.
（2）Trees are planted in ________ (we) country every year, which makes our countrymore and
more beautiful.
（3）—Is that bike Miss Gao’s?
—Yes, it is ________ (she).
（4）Help ________ (you) to some fruit, Jack.
（5） Their English teacher is from America, but ________ (we) is from England.
（6） --- ________ do you want to go with? (who)
--- I want to go with my mum.
（7）—________ books are they? (who)
—These books are my teacher’s.
（8）—________ is your sister? (who)
—My sister is Angel. She has long hair.
（9） —________ can I get to the bookstore? (how)
—Go straight. Turn right at the first crossing. It’s on your left.
（10）—________ do you like soccer? (why)
—Because it’s exciting.