All the students in my class can’t ______ the math problem. It’s too difficult for us.
A. work on B. work out C. work for
My father was watching TV ______ my mother was cooking.
A. whileB. untilC. when
She will call you if she ____.
A. goes toB. come backC. comes back
—Where is Japan, do you know?
—It’s ____ the east of China.
A. inB.onC. to
My parents are always strict ____ me.
A. withB. inC. on
---The shirt is beautiful. How much did it _________?
--- I __________ 98 yuan on it.
A. cost, spent B. pay, cost C. cost, paid
